remove unnecessary files

-type Subscription {
-  sendMessage: Message
-}

-import { isAuthenticated, prisma } from "../../../utils";
-import { NEW_MESSAGE_TOPIC } from "../../../topics";
-
-export default {
-  Subscription: {
-    sendMessage: {
-      subscribe: async (_, __, { request, pubsub }) => {
-        pubsub.asyncIterator(NEW_MESSAGE_TOPIC);
-      },
-    },
-  },
-};