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.

tests/unit/plugins/modules/test_jenkins_build.py

@@ -32,7 +32,7 @@ class JenkinsBuildMock:
             instance = JenkinsMock()
             response = JenkinsMock.get_build_info(instance, "host-delete", 1234)
             return response
-        except jenkins.JenkinsException as e:
+        except jenkins.JenkinsException:
             response = {}
             response["result"] = "ABSENT"
             return response