Revert "Merge pull request #11053 from yangchenyun/mine"

Those two files are required by active_support/rails.rb
loaded in active_model.rb

It is common to require common dependencies on the root
files to avoid boilerplate in each file.

This reverts commit 763635e30f17800ebc0a8ae98d780edc8ebfb4e5, reversing
changes made to 4f46ef36aaef217834f3f96d3689d32f6a6761ea.