remove a migration file for adding imagecache field

src/migrations/20200414164011-add-image-attachment-path-to-user.js

@@ -1,43 +0,0 @@
-require('module-alias/register');
-const logger = require('@alias/logger')('growi:migrate:add-image-attachment-parh-to-user');
-
-const mongoose = require('mongoose');
-const config = require('@root/config/migrate');
-
-const { getModelSafely } = require('@commons/util/mongoose-utils');
-
-module.exports = {
-
-  async up(db) {
-    logger.info('Apply migration');
-    mongoose.connect(config.mongoUri, config.mongodb.options);
-
-    const User = getModelSafely('User') || require('@server/models/user')();
-    require('@server/models/attachment')(); // for populating imageAttachment
-
-    const users = await User.find({ imageAttachment: { $exists: true } })
-      .populate({
-        path: 'imageAttachment',
-      })
-      .select('imageAttachment');
-
-    const requests = users.filter(user => user.imageAttachment).map((user) => {
-      return {
-        updateOne: {
-          filter: { _id: user._id },
-          update: { $set: { imageAttachmentPathCache: user.imageAttachment.filePathProxied } },
-        },
-      };
-    });
-
-    if (requests.length > 0) {
-      await db.collection('users').bulkWrite(requests);
-    }
-
-    logger.info('Migration has successfully applied');
-  },
-
-  down(db) {
-    db.collection('users').update({}, { $unset: 'imageAttachmentPathCache' });
-  },
-};