$wgGEHelpPanelLoggingEnabled was a feature flag for when EventLogging was initially added to the help panel (T211942: Help panel: code for instrumentation); it hasn't been used since. It needs to be passed through to frontend code and adds to response sizes; we should remove it. (codesearch)
QA notes
Removing the enabling parameter touches all of the codepaths for help panel instrumentation. As part of QA for this task, we should ensure correct data is logged in help panel's instrumentation.