8 calls to file_usage_delete()

FileDeleteTest::testInUse in drupal/modules/simpletest/tests/file.test
Tries deleting a file that is in use.
FileUsageTest::testRemoveUsage in drupal/modules/simpletest/tests/file.test
Tests file_usage_delete().
file_field_delete_file in drupal/modules/file/file.field.inc
Decrements the usage count for a file and attempts to delete it.
image_field_delete_field in drupal/modules/image/image.module
Implements hook_field_delete_field().
image_field_delete_instance in drupal/modules/image/image.module
Implements hook_field_delete_instance().
image_field_update_field in drupal/modules/image/image.module
Implements hook_field_update_field().
image_field_update_instance in drupal/modules/image/image.module
Implements hook_field_update_instance().
user_save in drupal/modules/user/user.module
Save changes to a user account or add a new user.