Bug 40685: Remove targets/nightly/var/mar_locales from rbm.conf

fixup for 98b4184d.

rbm.conf

@@ -212,13 +212,6 @@ targets:
                 GET c("var_p/nightly_torbrowser_version");
            END;
         -%]
-      # For nightly builds, we support updates for a limited set of locales
-      mar_locales:
-        - de
-        - es-ES
-        - fr
-        - ru
-        - uk
       max_torbrowser_incremental_from: 2
       build_infos_json: 1