Remove unused code that would raise a NameError.
diff --git a/Tools/gdb/libpython.py b/Tools/gdb/libpython.py
index 6ed6087..0d59981 100644
--- a/Tools/gdb/libpython.py
+++ b/Tools/gdb/libpython.py
@@ -55,7 +55,6 @@
 
 Py_TPFLAGS_HEAPTYPE = (1L << 9)
 
-Py_TPFLAGS_INT_SUBCLASS      = (1L << 23)
 Py_TPFLAGS_LONG_SUBCLASS     = (1L << 24)
 Py_TPFLAGS_LIST_SUBCLASS     = (1L << 25)
 Py_TPFLAGS_TUPLE_SUBCLASS    = (1L << 26)
@@ -312,8 +311,6 @@
         if tp_flags & Py_TPFLAGS_HEAPTYPE:
             return HeapTypeObjectPtr
 
-        if tp_flags & Py_TPFLAGS_INT_SUBCLASS:
-            return PyIntObjectPtr
         if tp_flags & Py_TPFLAGS_LONG_SUBCLASS:
             return PyLongObjectPtr
         if tp_flags & Py_TPFLAGS_LIST_SUBCLASS: