remove unused method and its type

packages/app/src/server/models/page-operation.ts

@@ -1,11 +1,12 @@
+import { getOrCreateModel } from '@growi/core';
 import mongoose, {
   Schema, Model, Document, QueryOptions, FilterQuery,
 } from 'mongoose';
-import { getOrCreateModel } from '@growi/core';
 
 import {
   IPageForResuming, IUserForResuming, IOptionsForResuming,
 } from '~/server/interfaces/page-operation';
+
 import { ObjectIdLike } from '../interfaces/mongoose-utils';
 
 type IObjectId = mongoose.Types.ObjectId;
@@ -47,7 +48,6 @@ export type PageOperationDocumentHasId = PageOperationDocument & { _id: ObjectId
 
 export interface PageOperationModel extends Model<PageOperationDocument> {
   findByIdAndUpdatePageActionStage(pageOpId: ObjectIdLike, stage: PageActionStage): Promise<PageOperationDocumentHasId | null>
-  findMainOps(filter?: FilterQuery<PageOperationDocument>, projection?: any, options?: QueryOptions): Promise<PageOperationDocumentHasId[]>
 }
 
 const pageSchemaForResuming = new Schema<IPageForResuming>({
@@ -105,15 +105,4 @@ schema.statics.findByIdAndUpdatePageActionStage = async function(
   }, { new: true });
 };
 
-schema.statics.findMainOps = async function(
-    filter?: FilterQuery<PageOperationDocument>, projection?: any, options?: QueryOptions,
-): Promise<PageOperationDocumentHasId[]> {
-
-  return this.find(
-    { ...filter, actionStage: PageActionStage.Main },
-    projection,
-    options,
-  );
-};
-
 export default getOrCreateModel<PageOperationDocument, PageOperationModel>('PageOperation', schema);