Revert "[MM-37984] Allow Desktop App to authenticate via external providers outside of the app on supported servers (#23795)" (#24039)

This reverts commit abdf4e58c3.

server/i18n/en.json

@@ -5023,30 +5023,6 @@
     "id": "app.custom_group.unique_name",
     "translation": "group name is not unique"
   },
-  {
-    "id": "app.desktop_token.authenticate.invalid_or_expired",
-    "translation": "Token does not exist or is expired"
-  },
-  {
-    "id": "app.desktop_token.create.collision",
-    "translation": "This token already exists in the system"
-  },
-  {
-    "id": "app.desktop_token.create.error",
-    "translation": "An error occured attempted to create the token"
-  },
-  {
-    "id": "app.desktop_token.validate.expired",
-    "translation": "Token is expired"
-  },
-  {
-    "id": "app.desktop_token.validate.invalid",
-    "translation": "Token is not valid"
-  },
-  {
-    "id": "app.desktop_token.validate.no_user",
-    "translation": "Cannot find a user for this token"
-  },
   {
     "id": "app.draft.delete.app_error",
     "translation": "Unable to delete the Draft."