Remove unrequired check (#14298)

* Remove unrequired check

The get_pool_account function no longer relies on a `_trucating` function,
and there is a test in place
should someone alter the function to create pool collisions.

* test needed in this case.

substrate/frame/asset-conversion/src/benchmarking.rs

@@ -17,8 +17,6 @@
 
 //! Asset Conversion pallet benchmarking.
 
-#![cfg(feature = "runtime-benchmarks")]
-
 use super::*;
 use frame_benchmarking::{benchmarks, whitelisted_caller};
 use frame_support::{