Remove return annotations

tests/Monolog/Handler/RollbarHandlerTest.php

@@ -68,12 +68,12 @@ class RollbarHandlerTest extends TestCase
             });
     }
 
-    private function createHandler(): RollbarHandler
+    private function createHandler()
     {
         return new RollbarHandler($this->rollbarNotifier, Logger::DEBUG);
     }
 
-    private function createExceptionRecord($level = Logger::DEBUG, $message = 'test', $exception = null): array
+    private function createExceptionRecord($level = Logger::DEBUG, $message = 'test', $exception = null)
     {
         return $this->getRecord($level, $message, array(
             'exception' => $exception ?: new Exception()