Merge pull request #29666 from kamipo/deprecate_database_specific_json_types

Deprecate database specific JSON types

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -854,9 +854,6 @@ def binary_to_sql(limit) # :nodoc:
           end
         end
 
-        class MysqlJson < Type::Json # :nodoc:
-        end
-
         class MysqlString < Type::String # :nodoc:
           def serialize(value)
             case value

activerecord/lib/active_record/connection_adapters/postgresql/oid.rb

@@ -8,7 +8,6 @@
 require_relative "oid/enum"
 require_relative "oid/hstore"
 require_relative "oid/inet"
-require_relative "oid/json"
 require_relative "oid/jsonb"
 require_relative "oid/money"
 require_relative "oid/oid"

activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb

-module ActiveRecord
-  module ConnectionAdapters
-    module PostgreSQL
-      module OID # :nodoc:
-        class Json < Type::Json # :nodoc:
-        end
-      end
-    end
-  end
-end