mysql2date() Inline Documentation is wrong

[Viper007Bond]

In [10408], gmmktime() and mktime() calls were replaced by strtotime() calls. The function's documentation wasn't updated to reflect the changes however.

Attached is a patch that just removes the incorrect documentation. If people want to figure out how the function works rather than what it does, then they can just look at the code. No need to document that.

In [19973]:

Remove obsolete mysql2date documentation. Props Viper007Bond. Fixes #20056.

In [19974]:

Overhaul mysql2date() documentation and parameter names. See #20056.