refactor(tests): use assert_has_event

closes #71 (closed)

pallets/identity/src/tests.rs

@@ -22,7 +22,6 @@ use crate::{
 use codec::Encode;
 //use frame_support::assert_noop;
 use frame_support::{assert_err, assert_ok};
-use frame_system::{EventRecord, Phase};
 use sp_runtime::testing::TestSignature;
 
 type IdtyVal = IdtyValue<u64, u64, ()>;