Treat any argument to the done callback as an error

This reduces the risk of incorrectly passing a spec due to not correctly
detecting that an argument is an `Error` instance. Detecting Error instances
in a way that's reliable and portable across different browsers, TrustedTypes,
and frames is difficult.

[Finishes #178267587]

src/core/QueueRunner.js

@@ -100,17 +100,11 @@ getJasmineRequireObj().QueueRunner = function(j$) {
       next = once(function next(err) {
         cleanup();
 
-        if (j$.isError_(err)) {
+        if (typeof err !== 'undefined') {
           if (!(err instanceof StopExecutionError) && !err.jasmineMessage) {
             self.fail(err);
           }
           self.errored = errored = true;
-        } else if (typeof err !== 'undefined' && !self.errored) {
-          self.deprecated(
-            'Any argument passed to a done callback will be treated as an ' +
-              'error in a future release. Call the done callback without ' +
-              "arguments if you don't want to trigger a spec failure."
-          );
         }
 
         function runNext() {