gh-153797: Fix crash when re-importing extension modules after OOM

Fix a crash that could occur after an out-of-memory error when re-importing
an extension module.

Author: lpyu001

Misc/NEWS.d/next/Core_and_Builtins/2026-07-16-10-12-32.gh-issue-153797.VqQ8r1.rst

@@ -0,0 +1,2 @@
+Fix a crash that could occur after an out-of-memory error when re-importing
+an extension module.

Python/import.c

@@ -2008,7 +2008,7 @@ reload_singlephase_extension(PyThreadState *tstate,
 
     Py_ssize_t index = _get_cached_module_index(cached);
     if (_modules_by_index_set(tstate->interp, index, mod) < 0) {
-        PyMapping_DelItem(modules, info->name);
+        remove_module(tstate, info->name);
         Py_DECREF(mod);
         return NULL;
     }