Removed mailing list plugin from configuration (#7971) (#7974)

Co-authored-by: Lorenzo Natali <lorenzonatali@geosolutionsgroup.com>

Author: offtherailz

web/client/configs/localConfig.json

@@ -640,7 +640,7 @@
               "fluid": true
             }
           }
-          , "MailingLists", "Footer", {
+          , "Footer", {
           "name": "Cookie",
           "cfg": {
             "externalCookieUrl" : "",