Deletes a file.
    Format
      #include  <stdio.h>
      int remove  (const char *file_spec);
1 – Argument
 file_spec
    A pointer to the string that is an OpenVMS or a UNIX style file
    specification. The file specification can include a wildcard
    in its version number. So, for example, files of the form
    filename.txt;* can be deleted.
2 – Description
    If you specify a directory in the filename and it is a search
    list that contains an error, Compaq C for OpenVMS Systems
    interprets it as a file error.
                                   NOTE
       The DECC$ALLOW_REMOVE_OPEN_FILES feature logical controls
       the behavior of the remove function on open files.
       Ordinarily, the operation fails. However, POSIX conformance
       dictates that the operation succeed.
       With DECC$ALLOW_REMOVE_OPEN_FILES enabled, this POSIX
       conformant behavior is achieved.
    When remove is used to delete a symbolic link, the link itself is
    deleted, not the file to which it refers.
    The remove and delete functions are functionally equivalent in
    the Compaq C RTL.
    See also delete.
3 – Return Values
    0                  Indicates success.
    nonzero value      Indicates failure.