Remove extra tabs that snuck in the XML file

Author: rebeccahum

WordPress-VIP-Go/ruleset.xml

@@ -257,8 +257,8 @@
 	</rule>
 
 	<!-- Silence is golden, these don't affect us on VIP Go -->
-	<rule ref="VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable">	
-		<severity>0</severity>	
+	<rule ref="VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable">
+		<severity>0</severity>
 	</rule>
 	<rule ref="WordPress.DB.SlowDBQuery.slow_db_query_meta_key">
 		<!-- We are silencing this one because VIP Go has a combined index on meta_key, meta_value-->