remove buggy optimization

Author: Fidget-Spinner

Python/optimizer_bytecodes.c

@@ -985,8 +985,7 @@ dummy_func(void) {
             ctx->frame->func = func;
         }
         // Fixed calls don't need IP guards.
-        if ((this_instr-1)->opcode == _SAVE_RETURN_OFFSET ||
-            (this_instr-1)->opcode == _CREATE_INIT_FRAME) {
+        if ((this_instr-1)->opcode == _CREATE_INIT_FRAME) {
             assert((this_instr+1)->opcode == _GUARD_IP__PUSH_FRAME);
             REPLACE_OP(this_instr+1, _NOP, 0, 0);
         }