Revert added test.

Failure case is crashing the whole test suite, also may not be
reliable

Author: johng

Modules/_testcapi/gc.c

@@ -271,42 +271,6 @@ test_gc_visit_objects_exit_early(PyObject *Py_UNUSED(self),
     Py_RETURN_NONE;
 }
 
-#ifndef Py_GIL_DISABLED
-static int
-gc_visit_callback_drop_current(PyObject *obj, void *arg)
-{
-    struct gc_visit_state_basic *state = (struct gc_visit_state_basic *)arg;
-    if (obj == state->target) {
-        state->found = 1;
-        Py_CLEAR(state->target);
-    }
-    return 1;
-}
-
-static PyObject *
-test_gc_visit_objects_drop_current(PyObject *Py_UNUSED(self),
-                                   PyObject *Py_UNUSED(ignored))
-{
-    struct gc_visit_state_basic state;
-
-    state.target = PySet_New(NULL);
-    if (state.target == NULL) {
-        return NULL;
-    }
-    state.found = 0;
-
-    PyUnstable_GC_VisitObjects(gc_visit_callback_drop_current, &state);
-    if (!state.found) {
-        Py_DECREF(state.target);
-        PyErr_SetString(
-            PyExc_AssertionError,
-            "test_gc_visit_objects_drop_current: Didn't find live set");
-        return NULL;
-    }
-    Py_RETURN_NONE;
-}
-#endif
-
 typedef struct {
     PyObject_HEAD
 } ObjExtraData;
@@ -405,9 +369,6 @@ static PyMethodDef test_methods[] = {
     {"test_gc_visit_objects_basic", test_gc_visit_objects_basic, METH_NOARGS, NULL},
     {"test_gc_visit_objects_frozen", test_gc_visit_objects_frozen, METH_NOARGS, NULL},
     {"test_gc_visit_objects_exit_early", test_gc_visit_objects_exit_early, METH_NOARGS, NULL},
-#ifndef Py_GIL_DISABLED
-    {"test_gc_visit_objects_drop_current", test_gc_visit_objects_drop_current, METH_NOARGS, NULL},
-#endif
     {"without_gc", without_gc, METH_O, NULL},
     {"with_tp_del", with_tp_del, METH_VARARGS, NULL},
     {NULL}