remove accidentally committed method

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/object/PythonObjectLibrary.java

@@ -60,11 +60,6 @@ public PHashingCollection getDict(PythonAbstractObject receiver) {
         return null;
     }
 
-    @Abstract(ifExported = "hasDict")
-    public PHashingCollection getOrCreateDict(PythonAbstractObject receiver) throws UnsupportedMessageException {
-        throw UnsupportedMessageException.create();
-    }
-
     @Abstract(ifExported = "hasDict")
     public void setDict(PythonAbstractObject receiver, PHashingCollection dict) throws UnsupportedMessageException {
         throw UnsupportedMessageException.create();