remove unnecessary benchmark feature config

Author: shannonwells

runtime/frequency/src/lib.rs

@@ -342,9 +342,6 @@ use pallet_frequency_tx_payment::types::GetAddKeyData;
 impl GetAddKeyData<RuntimeCall, AccountId, MessageSourceId> for MsaCallFilter {
 	fn get_add_key_data(call: &RuntimeCall) -> Option<(AccountId, AccountId, MessageSourceId)> {
 		match call {
-			#[cfg(feature = "runtime-benchmarks")]
-			RuntimeCall::System(frame_system::Call::remark { .. }) => None,
-
 			RuntimeCall::Msa(MsaCall::add_public_key_to_msa {
 				add_key_payload,
 				new_key_owner_proof: _,