Revert "Make go_list_opt_outs extend BaseGoAccountCommand"
Revert "Make go_list_opt_outs extend BaseGoAccountCommand"

* Must wait for tests to be written before changing

This reverts commit a3cfa99fee208ee6aa8ab3fdf0c487e2066de375.

praekelt/vumi-go,praekelt/vumi-go,praekelt/vumi-go,praekelt/vumi-go