Exclude Lint/UnusedMethodArgument for core library

Author: rastating

.rubocop.yml

@@ -43,3 +43,8 @@ Documentation:
 Style/IndentArray:
   Enabled: false
   Description: 'A lot of modules use a sensible indentation level that Rubocop does not like.'
+
+Lint/UnusedMethodArgument:
+  Description: 'A number of classes will contain unused parameters for documentation purposes.'
+  Exclude:
+    - 'lib/wpxf/**/*'