style: Fix pylint try-except-raise (W0706)

[echoix]

Do not catch exception only to raise it again

In one file (gui/wxpython/core/utils.py), there was a backport done in 2010 in https://trac.osgeo.org/grass/changeset/41398/ that was supposed to adapt https://trac.osgeo.org/grass/changeset/41396, but with part of the function extracted, having the try in GetListOfLocations is useless, as it is not really used, and will need to get caught elsewhere.

This is part of the effort to introduce Pylint 3.x for #3921

[echoix]

In
https://docs.python.org/3/tutorial/errors.html#defining-clean-up-actions, it mentions:

• If an exception occurs during execution of the try clause, the exception may be handled by an except clause. If the exception is not handled by an except clause, the exception is re-raised after the finally clause has been executed.
• An exception could occur during execution of an except or else clause. Again, the exception is re-raised after the finally clause has been executed.
• If the finally clause executes a break, continue or return statement, exceptions are not re-raised.

[ninsbl]

Looks good!