remove old copyright

Author: timfel

mx.graalpython/copyrights/overrides

@@ -580,7 +580,6 @@ graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/sequence
 graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/sequence/storage/SequenceStorageFactory.java,zippy.copyright
 graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/sequence/storage/SequenceStoreException.java,zippy.copyright
 graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/sequence/storage/TypedSequenceStorage.java,zippy.copyright
-graalpython/lib-graalpython/itertools.py,pypy.copyright
 graalpython/lib-graalpython/modules/hpy/debug/__init__.py,hpy.copyright
 graalpython/lib-graalpython/modules/hpy/debug/leakdetector.py,hpy.copyright
 graalpython/lib-graalpython/modules/hpy/debug/pytest.py,hpy.copyright