Remove no longer used annotation use statements and replace with attribute use statements

src/Bundle/ChillEventBundle/Controller/EventController.php

@@ -338,8 +338,6 @@ final class EventController extends AbstractController
 
     /**
      * create a form to add a participation with an event.
-     *
-     * @return \Symfony\Component\Form\FormInterface
      */
     protected function createAddEventParticipationByPersonForm(Person $person): \Symfony\Component\Form\FormInterface
     {
@@ -385,8 +383,6 @@ final class EventController extends AbstractController
 
     /**
      * create a form to add a participation with a person.
-     *
-     * @return \Symfony\Component\Form\FormInterface
      */
     protected function createAddParticipationByPersonForm(Event $event): \Symfony\Component\Form\FormInterface
     {
@@ -416,9 +412,6 @@ final class EventController extends AbstractController
         return $builder->getForm();
     }
 
-    /**
-     * @return \Symfony\Component\Form\FormInterface
-     */
     protected function createExportByFormatForm(): \Symfony\Component\Form\FormInterface
     {
         $builder = $this->createFormBuilder(['format' => 'xlsx'])
@@ -439,11 +432,9 @@ final class EventController extends AbstractController
     }
 
     /**
-     * @return Spreadsheet
-     *
      * @throws \PhpOffice\PhpSpreadsheet\Exception
      */
-    protected function createExportSpreadsheet(Event $event): \PhpOffice\PhpSpreadsheet\Spreadsheet
+    protected function createExportSpreadsheet(Event $event): Spreadsheet
     {
         $spreadsheet = new Spreadsheet();
         $sheet = $spreadsheet->getActiveSheet();
@@ -584,9 +575,6 @@ final class EventController extends AbstractController
         return $form;
     }
 
-    /**
-     * @return \Symfony\Component\Form\FormInterface
-     */
     private function createDeleteForm($event_id): \Symfony\Component\Form\FormInterface
     {
         return $this->createFormBuilder()