Why is the action of removing a digital file named "Delete"?

A directory is a list of files. When a file is removed, its entry is deleted from that list. On most early operating systems, a directory was actually just a text file given special treatment (users not being allowed to edit them directly), so the removal of the name from the list really was like deleting text from a document.

In fact, the actual release or erasure of the file contents from the storage device may not happen until later. On UNIX systems, deletion of the file's name is not enough to remove the file; a file will not be removed until all of its names have been deleted (on UNIX filesystems, one file may be named in many directories, something it inherited from MULTICS) and no process still has the file open. So there is a distinction between deletion - the removal of a reference to the file - and the actual removal/release of file contents.

Deleting a file is a usage from computer operating systems. In this context, remove is a synonym. Referring to deleting an actual physical file or document would be considered odd or confusing, you'd destroy it, or throw it out, or whatever one can do to a physical object.

The use of the term Delete might come from the fact that when you delete a file in an operating system, you really just remove it's entry from a list of files maintained by the system. It typically doesn't actually destroy the file.

"to delete" is just the Latin word for to destroy/annihilate/eliminate. It seems in computer language the term to delete has been adopted as standard term for making data vanish.

Actually when you say remove then you change position and in case of delete you actually cut out something.e.g,

1)The documents has been removed from that place(the position of documents have been changed may be they are at other place and there is chance to get them back )

2)The documents have been deleted(documents have been destroyed and there is no chance to get them back)