Unused variable $admin_permission in EntityAccessControlHandler::checkAccess

Problem/Motivation

Just unused variable found in \Drupal\Core\Entity\EntityAccessControlHandler::checkAccess

...
    160     if ($admin_permission = $this->entityType->getAdminPermission()) {
    161       return AccessResult::allowedIfHasPermission($account, $this->entityType->getAdminPermission());
    162     }
...

Proposed resolution

Make use of this variable as follows:

...
    160     if ($admin_permission = $this->entityType->getAdminPermission()) {
    161       return AccessResult::allowedIfHasPermission($account, $admin_permission);
    162     }
...

Remaining tasks

Just review.