* Revert "Merge pull request #25484 from jagadeshjai/feature__add_option_custom_sync_url" This reverts commitd547c86d6band9757d93508, reversing changes made toab6eba7159. * revert https://github.com/brave/brave-core/pull/27054 * fixed presubmit errors * Removed code supposed to support `Use Sync staging server` QA preference Related PR - https://github.com/brave/brave-core/pull/26804 --------- Co-authored-by: AlexeyBarabash <alexey@brave.com> Co-authored-by: AlexeyBarabash <AlexeyBarabash@users.noreply.github.com>