Ignore throws in function mocks

[unfulvio]

Summary

I have noticed that in some circumstances the mocks contained in API/function-mocks.php could trigger false positives in static analyzers like PhpStan or just the IDE if using WP_Mock within a project. I think by removing the @throws solves this, although PhpStan will complain about it in this project. I suppose since these are just internal mocks we can safely ignore.

I did try using @noinspection tags but PhpStorm wasn't happy (whether specific to unhandled exceptions or not).

As for the strict type notations, same reason, externally it will reflect WP behavior (the alternative was to leave non-strict and rely only on phpdoc -- like WP does -- but then PhpStan would complain again... could swap that for a phpstan-ignore again, up to you)

Closes #248

Contributor checklist

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly
• I have added tests to cover changes introduced by this pull request
• All new and existing tests pass

Testing

Reviewer checklist

• Code changes review
• Documentation changes review
• Unit tests pass
• Static analysis passes

[coveralls]

coverage: 66.445%. remained the same
when pulling 10dcee6 on ignore-throws-in-function-mocks
into 48b7f22 on trunk.

[coveralls]

coverage: 66.445%. remained the same
when pulling 93465a8 on ignore-throws-in-function-mocks
into 48b7f22 on trunk.

[coveralls]

coverage: 66.312% (-0.1%) from 66.445%
when pulling d96aa5f on ignore-throws-in-function-mocks
into 48b7f22 on trunk.

[agibson-godaddy]

Thanks for this! I too had noticed this and it was irksome. I appreciate a fix!

Just want to test it out quickly before merging, but it looks good.

[agibson-godaddy]

Confirmed this fixes the issue!