Remove duplicate permission items
As stated in fdroidserver!1455 (closed), the F-Droid website shows duplicated permission items. This MR removes them.
Here is the demo:
Before: https://f-droid.org/packages/priv.wh201906.serialtest/
After: https://wh201906.gitlab.io/-/fdroid-website/-/jobs/6677588883/artifacts/public/packages/priv.wh201906.serialtest/index.html
Edited by wh201906