Allow duplicate topics in smart contract events (#13065)

* Removed `has_duplicates` check form the `deposit_event`.
Removed the usage of `Error::DuplicateTopics`.

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_contracts

Co-authored-by: command-bot <>

substrate/frame/contracts/src/lib.rs

@@ -816,8 +816,6 @@ pub mod pallet {
 		RandomSubjectTooLong,
 		/// The amount of topics passed to `seal_deposit_events` exceeds the limit.
 		TooManyTopics,
-		/// The topics passed to `seal_deposit_events` contains at least one duplicate.
-		DuplicateTopics,
 		/// The chain does not provide a chain extension. Calling the chain extension results
 		/// in this error. Note that this usually  shouldn't happen as deploying such contracts
 		/// is rejected.