#10699: fix docstring for tzset: it does not take a parameter

Thanks to Garrett Cooper for the fix.

Modules/timemodule.c

@@ -715,7 +715,7 @@ time_tzset(PyObject *self, PyObject *unused)
 }
 
 PyDoc_STRVAR(tzset_doc,
-"tzset(zone)\n\
+"tzset()\n\
 \n\
 Initialize, or reinitialize, the local timezone to the value stored in\n\
 os.environ['TZ']. The TZ environment variable should be specified in\n\