Remove additional frame initialization

Author: colesbury

Include/internal/pycore_frame.h

@@ -212,16 +212,6 @@ _PyFrame_Initialize(
     for (int i = null_locals_from; i < code->co_nlocalsplus; i++) {
         frame->localsplus[i] = PyStackRef_NULL;
     }
-
-#ifdef Py_GIL_DISABLED
-    // On GIL disabled, we walk the entire stack in GC. Since stacktop
-    // is not always in sync with the real stack pointer, we have
-    // no choice but to traverse the entire stack.
-    // This just makes sure we don't pass the GC invalid stack values.
-    for (int i = code->co_nlocalsplus; i < code->co_nlocalsplus + code->co_stacksize; i++) {
-        frame->localsplus[i] = PyStackRef_NULL;
-    }
-#endif
 }
 
 /* Gets the pointer to the locals array
@@ -392,13 +382,6 @@ _PyFrame_PushTrampolineUnchecked(PyThreadState *tstate, PyCodeObject *code, int
     frame->owner = FRAME_OWNED_BY_THREAD;
     frame->visited = 0;
     frame->return_offset = 0;
-
-#ifdef Py_GIL_DISABLED
-    assert(code->co_nlocalsplus == 0);
-    for (int i = 0; i < code->co_stacksize; i++) {
-        frame->localsplus[i] = PyStackRef_NULL;
-    }
-#endif
     return frame;
 }