Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
fix some unhandled errors, ineffectual assignments, and misspellings
What this PR does / why we need it:
When I browsed the source code under the package, i found some variables have been defined, but not be used, so i changed it! At the same time, a spelling mistake has been found, thank you!