(Originally opened as https://gitlab.com/gitlab-org/gitlab/-/issues/420057) ## Context It was mentioned in a recent meeting that a pet peeve was that sometimes we have HAML partials/Rails helpers that are **never called**. This is dead code that could be removed from the codebase. ## Goal Experiment with the following tools to try to remove code that isn't used anywhere: * https://github.com/seattlerb/debride * https://github.com/unused-code/unused * https://github.com/danmayer/coverband ## Unused Helpers We have developed a script for detecting what we think might be unused methods: `REPORT_ALL_UNUSED_METHODS=1 scripts/lint/unused_helper_methods.rb`