gh-111956: Add thread-safe one-time initialization. (gh-111960)

Python/pystate.c

@@ -379,12 +379,11 @@ _Py_COMP_DIAG_IGNORE_DEPR_DECLS
 static const _PyRuntimeState initial = _PyRuntimeState_INIT(_PyRuntime);
 _Py_COMP_DIAG_POP
 
-#define NUMLOCKS 9
+#define NUMLOCKS 8
 #define LOCKS_INIT(runtime) \
     { \
         &(runtime)->interpreters.mutex, \
         &(runtime)->xi.registry.mutex, \
-        &(runtime)->getargs.mutex, \
         &(runtime)->unicode_state.ids.lock, \
         &(runtime)->imports.extensions.mutex, \
         &(runtime)->ceval.pending_mainthread.lock, \