1 files changed, 2 insertions, 11 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index 5f86a11c2d..e3b6327dd8 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -89,11 +89,6 @@ module ActiveRecord
         /mariadb/i.match?(full_version)
       end
 
-      # Returns true, since this connection adapter supports migrations.
-      def supports_migrations?
-        true
-      end
-
       def supports_bulk_alter? #:nodoc:
         true
       end
@@ -648,10 +643,6 @@ module ActiveRecord
         self.class.type_cast_config_to_boolean(@config.fetch(:strict, true))
       end
 
-      def valid_type?(type)
-        !native_database_types[type].nil?
-      end
-
       def default_index_type?(index) # :nodoc:
         index.using == :btree || super
       end
@@ -786,11 +777,11 @@ module ActiveRecord
         def change_column_sql(table_name, column_name, type, options = {})
           column = column_for(table_name, column_name)
 
-          unless options_include_default?(options)
+          unless options.key?(:default)
             options[:default] = column.default
           end
 
-          unless options.has_key?(:null)
+          unless options.key?(:null)
             options[:null] = column.null
           end