[MongoManager] drop name filter from getProjectsDeletedDocs

All the doc names we had in the projects collection are back-filled now.
A few docs will get dummy values back-filled.

services/docstore/app/js/MongoManager.js

@@ -39,9 +39,7 @@ module.exports = MongoManager = {
       .find(
         {
           project_id: ObjectId(project_id.toString()),
-          deleted: true,
-          // TODO(das7pad): remove name filter after back filling data
-          name: { $exists: true }
+          deleted: true
         },
         {
           projection: filter,

services/docstore/test/unit/js/MongoManagerTests.js

@@ -192,8 +192,7 @@ describe('MongoManager', function () {
       this.db.docs.find
         .calledWith({
           project_id: ObjectId(this.project_id),
-          deleted: true,
-          name: { $exists: true }
+          deleted: true
         })
         .should.equal(true)
     })