simplify redshift class by just subclassing pg

Author: stevecaldwell77

lib/URI/redshift.pm

@@ -1,9 +1,5 @@
 package URI::redshift;
-use base 'URI::_db';
+use base 'URI::pg';
 our $VERSION = '0.18';
 
-sub default_port { 5432 }
-sub dbi_driver   { 'Pg' }
-sub canonical_engine { 'redshift' }
-
 1;