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/nosh.py

@@ -517,8 +517,6 @@ def main():
     )
 
     service = module.params["name"]
-    rc = 0
-    out = err = ""
     result = {
         "name": service,
         "changed": False,