MDL-43404 behat: Removing auto accept_alert

lib/tests/behat/behat_hooks.php

@@ -205,15 +205,6 @@ public function before_scenario($event) {
             self::$initprocessesfinished = true;
         }
 
-        // Closing JS dialogs if present. Otherwise they would block this scenario execution.
-        if ($this->running_javascript()) {
-            try {
-                $session->getDriver()->getWebDriverSession()->accept_alert();
-            } catch (NoAlertOpenError $e) {
-                // All ok, there should not be JS dialogs in theory.
-            }
-        }
-
     }
 
     /**
@@ -338,13 +329,6 @@ public function i_look_for_exceptions() {
 
         } catch (NoSuchWindow $e) {
             // If we were interacting with a popup window it will not exists after closing it.
-        } catch (UnexpectedAlertOpen $e) {
-            // We fail the scenario if we find an opened JS alert/confirm, in most of the cases it
-            // will be there because we are leaving an edited form without submitting/cancelling
-            // it, but moodle is using JS confirms and we can not just cancel the JS dialog
-            // as in some cases (delete activity with JS enabled for example) the test writer should
-            // use extra steps to deal with moodle's behaviour.
-            throw new Exception('Modal window present. Ensure there are no edited forms pending to submit/cancel.');
         }
     }