entc/gen: remove unnecessary function from codegen (#3287)

examples/privacyadmin/ent/user.go

@@ -95,9 +95,3 @@ func (u *User) String() string {
 
 // Users is a parsable slice of User.
 type Users []*User
-
-func (u Users) config(cfg config) {
-	for _i := range u {
-		u[_i].config = cfg
-	}
-}