Delete a File
You can delete copies of files or uploaded files that you no longer need. However, you can delete only those files that you have copied, moved, or uploaded.
You cannot delete the original files that were created during installation or update. Before the file is deleted, a copy of the file is saved in the backup directory.
Caution: Deleting a file can affect your production site. Be sure that the
file you are deleting is not necessary for proper functioning of your
site. Always make backup copies of files that you may need in the
future.