A few test tearDown() methods don't call parent::tearDown()

[desrosj]

Test methods should always call parent::tearDown(). Each test method should be verified and tested.

Companion ticket to #37375

[desrosj]

Looks like only one missing. But, there was also one tearDown() method that only called parent::tearDown(), so that one can be removed.

[desrosj]

In 44584:

Tests: Add missing parent::tearDown().

Also, remove a tearDown() method that was not serving any purpose.

Fixes #45931.