Merge pull request #1596 from adamwojs/removed_redundant_null_check

Removed redundant null check in phpStringLiteralExpressionClassReference method

Author: Haehnchen

src/main/java/fr/adrienbrault/idea/symfony2plugin/config/php/PhpConfigReferenceContributor.java

@@ -162,7 +162,7 @@ private static boolean phpStringLiteralExpressionClassReference(String signature
         }
 
         ParameterList parameterList = (ParameterList) psiElement.getContext();
-        if (parameterList == null || !(parameterList.getContext() instanceof NewExpression)) {
+        if (!(parameterList.getContext() instanceof NewExpression)) {
             return false;
         }