Don't ask something that we don't want to

We only want to support adapters that we officially support through the
entire framework so it is better to not ask patches for adapters that
we may not support

Author: rafaelfranca

railties/lib/rails/commands/dbconsole.rb

@@ -90,7 +90,7 @@ def start
         find_cmd_and_exec("sqsh", *args)
 
       else
-        abort "Unknown command-line client for #{config['database']}. Submit a Rails patch to add support!"
+        abort "Unknown command-line client for #{config['database']}."
       end
     end