Run Argument Clinic: METH_VARARGS=>METH_FASTCALL

Issue #29286. Run Argument Clinic to get the new faster METH_FASTCALL calling
convention for functions using only positional arguments.
diff --git a/Python/clinic/_warnings.c.h b/Python/clinic/_warnings.c.h
index c15c9be..550c73f 100644
--- a/Python/clinic/_warnings.c.h
+++ b/Python/clinic/_warnings.c.h
@@ -35,4 +35,4 @@
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=b3c5297c2c55778c input=a9049054013a1b77]*/
+/*[clinic end generated code: output=acadf1788059034c input=a9049054013a1b77]*/