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/mock.rs

@@ -178,7 +178,7 @@ impl Config for Test {
 	type MultiAssetId = NativeOrAssetId<u32>;
 	type MultiAssetIdConverter = NativeOrAssetIdConverter<u32>;
 
-	#[cfg(any(test, feature = "runtime-benchmarks"))]
+	#[cfg(feature = "runtime-benchmarks")]
 	type BenchmarkHelper = ();
 }