Remove unnecessary exceptions

Co-authored-by: Alain Schlesser <[email protected]>

Author: danielbachhuber

phpcs.xml.dist

@@ -13,10 +13,6 @@
 	<!-- What to scan. -->
 	<file>./.maintenance/</file>
 
-	<!-- Ignoring select files/folders.
-		 https://github.com/squizlabs/PHP_CodeSniffer/wiki/Advanced-Usage#ignoring-files-and-folders -->
-	<exclude-pattern>*/tests/data/*</exclude-pattern>
-
 	<!-- Show progress. -->
 	<arg value="p"/>