Merge pull request #15359 from kuldeepaggarwal/f-remove-unwanted_to_sym

remove unwanted `to_sym` call.

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

@@ -5,7 +5,7 @@ class SchemaCreation < AbstractAdapter::SchemaCreation
         private
 
         def visit_AddColumn(o)
-          sql_type = type_to_sql(o.type.to_sym, o.limit, o.precision, o.scale)
+          sql_type = type_to_sql(o.type, o.limit, o.precision, o.scale)
           sql = "ADD COLUMN #{quote_column_name(o.name)} #{sql_type}"
           add_column_options!(sql, column_options(o))
         end