Revert "handle array callbacks"

This reverts commit b80ddf4.

src/Illuminate/Events/Dispatcher.php

@@ -365,7 +365,7 @@ protected function addInterfaceListeners($eventName, array $listeners = [])
      */
     public function makeListener($listener, $wildcard = false)
     {
-        if (is_string($listener) || is_array($listener)) {
+        if (is_string($listener)) {
             return $this->createClassListener($listener, $wildcard);
         }
 
@@ -381,7 +381,7 @@ public function makeListener($listener, $wildcard = false)
     /**
      * Create a class based listener using the IoC container.
      *
-     * @param  string|array  $listener
+     * @param  string  $listener
      * @param  bool  $wildcard
      * @return \Closure
      */
@@ -401,12 +401,12 @@ public function createClassListener($listener, $wildcard = false)
     /**
      * Create the class based event callable.
      *
-     * @param  string|array  $listener
+     * @param  string  $listener
      * @return callable
      */
     protected function createClassCallable($listener)
     {
-        [$class, $method] = is_array($listener) ? $listener : $this->parseClassCallable($listener);
+        [$class, $method] = $this->parseClassCallable($listener);
 
         if ($this->handlerShouldBeQueued($class)) {
             return $this->createQueuedHandlerCallable($class, $method);

tests/Events/EventsDispatcherTest.php

@@ -327,16 +327,6 @@ public function testClassesWork()
         $this->assertSame('baz', $_SERVER['__event.test']);
     }
 
-    public function testArrayCallbackListenersAreHandled()
-    {
-        unset($_SERVER['__event.ExampleListener']);
-        $d = new Dispatcher;
-        $d->listen(ExampleEvent::class, [ExampleListener::class, 'hear']);
-        $d->dispatch(new ExampleEvent);
-
-        $this->assertTrue($_SERVER['__event.ExampleListener']);
-    }
-
     public function testEventClassesArePayload()
     {
         unset($_SERVER['__event.test']);
@@ -400,11 +390,3 @@ class AnotherEvent implements SomeEventInterface
 {
     //
 }
-
-class ExampleListener
-{
-    public function hear()
-    {
-        $_SERVER['__event.ExampleListener'] = true;
-    }
-}