build: Remove unneeded Squiz.WhiteSpace.FunctionSpacing

It is already part of the default ruleset.xml

Change-Id: I681d2fe972241f9cb5d1768c3e6c0f387ddff239

.phpcs.xml

@@ -2,12 +2,6 @@
 <ruleset>
 	<rule ref="./vendor/mediawiki/mediawiki-codesniffer/MediaWiki" />
 
-	<rule ref="Squiz.WhiteSpace.FunctionSpacing">
-		<properties>
-			<property name="spacing" value="1" />
-		</properties>
-	</rule>
-
 	<file>.</file>
 	<arg name="extensions" value="php" />
 	<arg name="encoding" value="UTF-8" />