excise the remains of STOP_CODE, which hasn't done anything useful for years
diff --git a/Lib/opcode.py b/Lib/opcode.py
index 8e15d13..b631b25 100644
--- a/Lib/opcode.py
+++ b/Lib/opcode.py
@@ -43,7 +43,6 @@
 # Instruction opcodes for compiled code
 # Blank lines correspond to available opcodes
 
-def_op('STOP_CODE', 0)
 def_op('POP_TOP', 1)
 def_op('ROT_TWO', 2)
 def_op('ROT_THREE', 3)
diff --git a/Lib/test/test_dis.py b/Lib/test/test_dis.py
index 643e2e6..4b0b02a 100644
--- a/Lib/test/test_dis.py
+++ b/Lib/test/test_dis.py
@@ -200,7 +200,7 @@
                                         lines)))
 
     def test_opmap(self):
-        self.assertEqual(dis.opmap["STOP_CODE"], 0)
+        self.assertEqual(dis.opmap["NOP"], 9)
         self.assertIn(dis.opmap["LOAD_CONST"], dis.hasconst)
         self.assertIn(dis.opmap["STORE_NAME"], dis.hasname)