simplify weight accounting

pallets/membership/src/lib.rs

@@ -293,20 +293,14 @@ pub mod pallet {
 
         /// perform membership removal
         pub fn do_remove_membership(idty_id: T::IdtyId, reason: MembershipRemovalReason) -> Weight {
-            let mut weight = Weight::zero();
-            let mut add_db_reads_writes = |reads, writes| {
-                weight = weight.saturating_add(T::DbWeight::get().reads_writes(reads, writes));
-            };
-
+            let mut weight = T::DbWeight::get().reads_writes(2, 3);
             if let Some(membership_data) = Membership::<T>::take(idty_id) {
-                add_db_reads_writes(1, 1);
                 Self::unschedule_membership_expiry(idty_id, membership_data.expire_on);
-                add_db_reads_writes(1, 2);
                 Self::deposit_event(Event::MembershipRemoved {
                     member: idty_id,
                     reason,
                 });
-                weight = weight.saturating_add(T::OnRemoveMembership::on_removed(&idty_id));
+                weight += T::OnRemoveMembership::on_removed(&idty_id);
             }
             weight
         }