Remove backup_restore_hooks path for gitlab-rails

This was fixed upstream on master.

config/software/gitlab-rails.rb

@@ -51,9 +51,6 @@ build do
   # the GitLab backup script.
   patch :source => "backup_uploads_realpath.patch"
-  # Patch the gitlab backup script to correctly restore gitlab-shell hooks
-  patch :source => "backup_restore_hooks.patch"
-
   bundle "install --without mysql development test --path=#{install_dir}/embedded/service/gem", :env => env
   # In order to precompile the assets, we need to get to a state where rake can