Revert PR #885 in favour of #883 (#896)

Co-authored-by: Aidan Haran <aharan@fusioneer.com>

Author: aidanharan

CHANGELOG.md

@@ -10,7 +10,6 @@
 - [#879](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/879) Added visit method for HomogeneousIn
 - [#880](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/880) Handle any default column class when deduplicating
 - [#861](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/861) Fix Rails 6.1 database config
-- [#885](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/885) Fix the quoting of ActiveModel attributes
 - [#890](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/890) Fix removal of invalid ordering from select statements
 - [#881](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/pull/881) Dump column collation to schema.rb and allow collation changes using column_change
 

lib/active_record/connection_adapters/sqlserver/quoting.rb

@@ -118,8 +118,6 @@ def _quote(value)
             value.quoted
           when String, ActiveSupport::Multibyte::Chars
             "#{QUOTED_STRING_PREFIX}#{super}"
-          when ActiveModel::Attribute
-            quote(value.value_for_database)
           else
             super
           end