Remove the TravisCI configuration file

[desrosj]

With the introduction of GitHub Action workflows in #50401, TravisCI is no longer needed for running automated testing. The configuration file should be removed from Core.

More information about the reasons for this transition can also be found here: ​https://make.wordpress.org/core/2020/10/15/introducing-github-actions-for-automated-testing/.

[desrosj]

In 49876:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Fixes #52161. See #50401.

[desrosj]

See #26364. Reopening for backport.

[desrosj]

In 49877:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.6 branch.
See #52161. See #50401.

[desrosj]

In 49878:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.5 branch.
See #52161. See #50401.

[desrosj]

In 49879:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.4 branch.
See #52161. See #50401.

[desrosj]

In 49880:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.3 branch.
See #52161. See #50401.

[desrosj]

In 49881:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.2 branch.
See #52161. See #50401.

[desrosj]

In 49882:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.1 branch.
See #52161. See #50401.

[desrosj]

In 49883:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 5.0 branch.
See #52161. See #50401.

[desrosj]

In 49884:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.9 branch.
See #52161. See #50401.

[desrosj]

In 49885:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.8 branch.
See #52161. See #50401.

[desrosj]

In 49886:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.7 branch.
See #52161. See #50401.

[desrosj]

In 49887:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.6 branch.
See #52161. See #50401.

[desrosj]

In 49888:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.5 branch.
See #52161. See #50401.

[desrosj]

In 49890:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.3 branch.
See #52161. See #50401.

[desrosj]

In 49891:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.2 branch.
See #52161. See #50401.

[desrosj]

In 49892:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.1 branch.
See #52161. See #50401.

[desrosj]

In 49893:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 4.0 branch.
See #52161. See #50401.

[desrosj]

In 49894:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 3.9 branch.
See #52161. See #50401.

[desrosj]

In 49895:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 3.8 branch.
See #52161. See #50401.

[desrosj]

In 49898:

Build/Test Tools: Remove the TravisCI configuration file.

In [49162], GitHub Action workflow configuration files were introduced to run all of Core’s automated testing with the intent to fully transition after some time was allowed for testing.

After two full months of testing, the time to finish this transition has come.

We thank TravisCI for testing the codebase through nearly 20 major and many more minor releases.

Merges [49876] to the 3.7 branch.
See #52161. See #50401.

[ocean90]

In 50697:

Build/Test Tools: Remove remaining Travis CI references.

• Remove travis: tasks in Gruntfile.js.
• Remove status badge in README.md that comes from Travis CI via shields.io.
• Remove Travis CI related skipping in the WP_UnitTestCase_Base::skipOnAutomatedBranches() test method and related Docker environment variables.

Props johnbillion, SergeyBiryukov, ocean90.
See #52161.
Fixes #52666.