Remove randomly generated style colors (#4228)
Remove randomly generated style colors (#4228)

The hash in the filename of the final stylesheet asset is generated from its contents. When we deployed a build to multiple server instances, they were each generating different file names.
tsl143/addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend