9 calls to file_delete() in Drupal 7

EntityCrudHookTestCase::testFileHooks in modules/simpletest/tests/entity_crud_hook_test.test

Tests hook invocations for CRUD operations on files.

FileDeleteTest::testInUse in modules/simpletest/tests/file.test

Tries deleting a file that is in use.

FileDeleteTest::testUnused in modules/simpletest/tests/file.test

Tries deleting a normal file (as opposed to a directory, symlink, etc).

FileDownloadTest::checkUrl in modules/simpletest/tests/file.test

Download a file from the URL generated by file_create_url().

file_field_delete_file in modules/file/file.field.inc

Decrements the usage count for a file and attempts to delete it.

file_managed_file_submit in modules/file/file.module

Form submission handler for upload / remove buttons of managed_file elements.

file_move in includes/file.inc

Moves a file to a new location and update the file's database entry.

system_cron in modules/system/system.module

Implements hook_cron().

user_save in modules/user/user.module

Save changes to a user account or add a new user.