Remove unused test helper method.

test/syn_test_suite_helper.erl

@@ -39,7 +39,6 @@
 -export([assert_registry_scope_subcluster/3, assert_pg_scope_subcluster/3]).
 -export([assert_received_messages/1]).
 -export([assert_empty_queue/1]).
--export([assert_same_array_with_same_members/2]).
 -export([assert_wait/2]).
 -export([send_error_logger_to_disk/0]).
 
@@ -269,22 +268,6 @@ assert_empty_queue(Pid) when is_pid(Pid) ->
             ct:fail("~n\tMessage queue was not empty, got:~n\t~p~n", [Messages])
     end.
 
-assert_same_array_with_same_members(Arr1, Arr2) ->
-    assert_same_array_with_same_members(Arr1, Arr2, []).
-assert_same_array_with_same_members([], [], []) ->
-    ok;
-assert_same_array_with_same_members([], RemArr2, RemArr1) ->
-    ct:fail("~n\tIn 1 only: ~p~n\tIn 2 only: ~p~n", [RemArr1, RemArr2]);
-assert_same_array_with_same_members([E1 | Arr1], Arr2, RemArr1) ->
-    case lists:member(E1, Arr2) of
-        false ->
-            assert_same_array_with_same_members(Arr1, Arr2, [E1 | RemArr1]);
-
-        true ->
-            NewArr2 = lists:delete(E1, Arr2),
-            assert_same_array_with_same_members(Arr1, NewArr2, RemArr1)
-    end.
-
 assert_wait(ExpectedResult, Fun) ->
     assert_wait(ExpectedResult, Fun, os:system_time(millisecond)).
 assert_wait(ExpectedResult, Fun, StartAt) ->