Remove incorrectly committed script

* Useful but should no longer be in the repo
TEIIDDES-1555 Fix errors when creating WS model

* ClassCastException: MappingNodeImpl cannot be cast to IMappingElement
 * Root element of MappingDocumentImpl should not be just a MappingNodeImpl
   but one of the wrapped classes depending on the actual RootNode.

* ERROR: TEIID30387 Could not load UDF "+", since its invocation class
  "org.teiid.query.function.FunctionMethods" could not be found.
 * FunctionLibraryImpl constructors should all set the classloader to allow
   the FunctionMethods class to be reflectively loaded.