minor #5672 DX: do not test deprecated fixer (kubawerlos)

This PR was merged into the 2.19-dev branch.

Discussion
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DX: do not test deprecated fixer

Cleanup for #4238.

Commits
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b0360f1 DX: do not test deprecated fixer

tests/Fixtures/Integration/misc/PHP7_4.test

@@ -9,7 +9,7 @@ PHP 7.4 test.
     "no_null_property_initialization": true,
     "no_unset_on_property": true,
     "pow_to_exponentiation": true,
-    "trailing_comma_in_multiline_array": {"after_heredoc": true},
+    "trailing_comma_in_multiline": {"after_heredoc": true},
     "visibility_required": false
 }
 --REQUIREMENTS--