Improve Python code: address unused variables (#11049)

* Address F841 (unused variable).

* Reformat.

* Add changelog fragment.

* More cleanup.

* Remove trailing whitespace.

* Readd removed code as a comment with TODO.

plugins/modules/discord.py

@@ -183,11 +183,6 @@ def main():
         supports_check_mode=True,
     )
 
-    result = dict(
-        changed=False,
-        http_code="",
-    )
-
     if module.check_mode:
         response, info = discord_check_mode(module)
         if info["status"] != 200: