Sergey Biryukov c9ff475e1f Tests: Remove some unnecessary function_exists() checks for compat functions.
Each of these functions already has a separate test for availability.

If any of them are unavailable, then the test should fail rather than be skipped.

Follow-up to [52038], [52039], [52040].

Props johnbillion.
See #59647.

git-svn-id: https://develop.svn.wordpress.org/trunk@56969 602fd350-edb4-49c9-b593-d223f7449a82
2023-10-18 10:39:19 +00:00
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