Remove `page_cache_extension` method

Do not invoke callbacks when delete_all is called

Conflicts:
	activerecord/CHANGELOG.md

calling default_scope without a proc will raise ArgumentError

Calling default_scope without a proc will now raise `ArgumentError`.

Remove AR::Connection#clear_stale_cached_connections! deprecated method

Removed deprecated method type_cast_code from Column

Use native Array#uniq and Array#uniq! instead.

  ActionController::AbstractRequest  => ActionDispatch::Request
  ActionController::Request          => ActionDispatch::Request
  ActionController::AbstractResponse => ActionDispatch::Response
  ActionController::Response         => ActionDispatch::Response
  ActionController::Routing          => ActionDispatch::Routing
  ActionController::Integration      => ActionDispatch::Integration
  ActionController::IntegrationTest  => ActionDispatch::IntegrationTest

Removed deprecated options for assocations

Deprecated options `delete_sql`, `insert_sql`, `finder_sql` and `counter_sql`
have been deleted.

Commit cfa35c55 removed the
buffered_logger from AS, which required the logger file. Now we need to
add the proper require here.

Remove `FormBuilder` deprecation warning about block argument and tests

remove deprecated `assert_present` and `assert_blank`.

Remove deprecated `:distinct` option from `Relation#count`.

Change Rails Migration generator module to use AS::Concern

Removed deprecated methods partial_updates and family

Removed deprecated methods `partial_updates`, `partial_updates?` and
`partial_updates=`

Removed deprecated scoped method

Conflicts:
	activerecord/CHANGELOG.md

Removed deprecated default_scopes?