remove unnecessary file

-type Mutation {
-  newMessage(receiverEmail: String, message: String!, roomId: Int): Message!
-}

-import { isAuthenticated, prisma } from "../../../utils";
-import { ONE_TO_ONE_MESSAGE } from "../../../topics";
-
-export default {
-  Mutation: {
-    newMessage: async (_, args, { request, pubsub }) => {
-      isAuthenticated(request);
-      const { user } = request;
-      const { receiverEmail, message, roomId } = args;
-      const receiver = await prisma.user.findOne({
-        where: {
-          email: receiverEmail,
-        },
-      });
-
-      let room = await prisma.room.findOne({
-        where: {
-          id: roomId,
-        },
-      });
-
-      // 방이 없는 경우
-      if (room === undefined || room === null) {
-        // 보내는 사람과 받는 사람이 다른 경우
-        if (user.id !== receiver.id) {
-          room = await prisma.room.create({
-            data: {
-              participants: {
-                connect: [{ id: receiver.id }, { id: user.id }],
-              },
-            },
-          });
-        } else {
-          // 자기 자신에게 보내는 경우
-          room = await prisma.room.create({
-            data: {
-              participants: {
-                connect: [{ id: user.id }],
-              },
-            },
-          });
-        }
-      } else {
-        // 방이 원래 있던 경우 업데이트
-        room = await prisma.room.update({
-          where: {
-            id: roomId,
-          },
-          data: {
-            participants: {
-              connect: [{ id: user.id }, { id: receiver.id }],
-            },
-          },
-        });
-      }
-
-      if (!room) {
-        throw new Error("There is no room");
-      }
-
-      const subMessage = await prisma.message.create({
-        data: {
-          text: message,
-          to: {
-            connect: { id: receiver.id },
-          },
-          from: {
-            connect: { id: user.id },
-          },
-          room: {
-            connect: {
-              id: room.id,
-            },
-          },
-        },
-      });
-      pubsub.publish(ONE_TO_ONE_MESSAGE, subMessage);
-      return subMessage;
-    },
-  },
-};