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/jenkins_build_info.py

@@ -153,7 +153,7 @@ class JenkinsBuildInfo:
                 self.build_number = job_info["lastBuild"]["number"]
 
             return self.server.get_build_info(self.name, self.build_number)
-        except jenkins.JenkinsException as e:
+        except jenkins.JenkinsException:
             response = {}
             response["result"] = "ABSENT"
             return response