Revert "fix: Delete done right"

This reverts commit 21a2b4d9.

store/files.go

@@ -242,7 +242,7 @@ func (st *Store) GetFileUsage(showID uint64, id uint64) (playlists []Playlist, e
 func (st *Store) DeleteFile(showID uint64, id uint64) (err error) {
 	// make sure the file actually belongs to <show> since permissions are enforced
 	// based on show membership
-	result := st.db.Where("show_id = ?", showID).Delete(File{ID: id})
+	result := st.db.Where("show_id = ?", showID).Delete(&File{ID: id})
 	if err = result.Error; err != nil {
 		// we assume this is due to a FK constraint -> file in use by playlist_entry
 		usageErr := &ErrFileInUse{}