types: remove incorrect callback type signature for projection

Author: vkarpov15

test/types/models.test.ts

@@ -225,10 +225,6 @@ function find() {
   Project.find({}, { name: 1 });
   Project.find({}, { name: 0 });
 
-  // filter + callback
-  Project.find({}, (error: CallbackError, result: IProject[]) => console.log(error, result));
-  Project.find({ name: 'Hello' }, (error: CallbackError, result: IProject[]) => console.log(error, result));
-
   // filter + projection + options
   Project.find({}, undefined, { limit: 5 });
   Project.find({}, null, { limit: 5 });

test/types/queries.test.ts

@@ -97,16 +97,6 @@ Test.find({ name: ['Test1', 'Test2'] }).exec();
 // Implicit `$in` for regex string
 Test.find({ name: [/Test1/, /Test2/] });
 
-Test.find({ name: 'test' }, (err: Error | null, docs: ITest[]) => {
-  console.log(!!err, docs[0].age);
-});
-
-Test.findOne({ name: 'test' }, (err: Error | null, doc: ITest | null) => {
-  if (doc != null) {
-    console.log(!!err, doc.age);
-  }
-});
-
 Test.find({ name: { $gte: 'Test' } }, null, { collation: { locale: 'en-us' } }).exec().
   then((res: Array<ITest>) => console.log(res[0].name));
 

types/index.d.ts

@@ -686,9 +686,8 @@ declare module 'mongoose' {
   type _IDType = { _id?: boolean | 1 | 0 };
   type InclusionProjection<T> = IsItRecordAndNotAny<T> extends true ? Projector<WithLevel1NestedPaths<T>, true | 1> & _IDType : AnyObject;
   type ExclusionProjection<T> = IsItRecordAndNotAny<T> extends true ? Projector<WithLevel1NestedPaths<T>, false | 0> & _IDType : AnyObject;
-  type ProjectionUnion<T> = InclusionProjection<T> | ExclusionProjection<T>;
 
-  export type ProjectionType<T> = (ProjectionUnion<T> & AnyObject) | string | ((...args: any) => any);
+  export type ProjectionType<T> = (InclusionProjection<T> & AnyObject) | (ExclusionProjection<T> & AnyObject) | string;
   export type SortValues = SortOrder;
 
   export type SortOrder = -1 | 1 | 'asc' | 'ascending' | 'desc' | 'descending';