Updated to eslint 9

This isn't officially compatible with the oldest version of Node that
Jasmine supports, but it works. If it stops working, we can always disable
linting in CI builds on older Node versions.

spec/core/QueueRunnerSpec.js

@@ -239,7 +239,6 @@ describe('QueueRunner', function() {
 
     it("sets a timeout if requested for asynchronous functions so they don't go on forever", function() {
       const timeout = 3,
-        // eslint-disable-next-line no-unused-vars
         beforeFn = { fn: function(done) {}, type: 'before', timeout: timeout },
         queueableFn = { fn: jasmine.createSpy('fn'), type: 'queueable' },
         onComplete = jasmine.createSpy('onComplete'),
@@ -287,7 +286,6 @@ describe('QueueRunner', function() {
     });
 
     it('by default does not set a timeout for asynchronous functions', function() {
-      // eslint-disable-next-line no-unused-vars
       const beforeFn = { fn: function(done) {} },
         queueableFn = { fn: jasmine.createSpy('fn') },
         onComplete = jasmine.createSpy('onComplete'),
@@ -310,7 +308,6 @@ describe('QueueRunner', function() {
 
     it('clears the timeout when an async function throws an exception, to prevent additional exception reporting', function() {
       const queueableFn = {
-          // eslint-disable-next-line no-unused-vars
           fn: function(done) {
             throw new Error('error!');
           }
@@ -409,7 +406,6 @@ describe('QueueRunner', function() {
 
     it('continues running functions when an exception is thrown in async code without timing out', function() {
       const queueableFn = {
-          // eslint-disable-next-line no-unused-vars
           fn: function(done) {
             throwAsync();
           },
@@ -461,7 +457,6 @@ describe('QueueRunner', function() {
 
     it('handles a global error event with a message but no error', function() {
       const queueableFn = {
-        // eslint-disable-next-line no-unused-vars
         fn: function(done) {
           const currentHandler = globalErrors.pushListener.calls.mostRecent()
             .args[0];
@@ -641,7 +636,6 @@ describe('QueueRunner', function() {
 
     it('issues an error if the function also takes a parameter', function() {
       const queueableFn = {
-          // eslint-disable-next-line no-unused-vars
           fn: function(done) {
             return new StubPromise();
           }
@@ -666,7 +660,6 @@ describe('QueueRunner', function() {
     });
 
     it('issues a more specific error if the function is `async`', function() {
-      // eslint-disable-next-line no-unused-vars
       async function fn(done) {}
       const onException = jasmine.createSpy('onException'),
         queueRunner = new jasmineUnderTest.QueueRunner({
@@ -720,7 +713,6 @@ describe('QueueRunner', function() {
 
   it('continues running the functions even after an exception is thrown in an async spec', function() {
     const queueableFn = {
-        // eslint-disable-next-line no-unused-vars
         fn: function(done) {
           throw new Error('error');
         }