Remove duplicate merge

https://github.com/rails/rails/commit/2eecc0d8dccf7f12518e05a72192eb853e5ee474 considered default_scope and local scope, but https://github.com/rails/rails/commit/94924dc32baf78f13e289172534c2e71c9c8cade simplifed default scope.
So, this merging became meaningless.