remove unused help webpack bundle

config/webpack.config.js

@@ -47,7 +47,6 @@ function generateEntries() {
     cycle_analytics:      './cycle_analytics/cycle_analytics_bundle.js',
     environments:         './environments/environments_bundle.js',
     filtered_search:      './filtered_search/filtered_search_bundle.js',
-    help:                 './help/help.js',
     monitoring:           './monitoring/monitoring_bundle.js',
     mr_notes:             './mr_notes/index.js',
     notebook_viewer:      './blob/notebook_viewer.js',