Remove unused headers.

--HG--
extra : convert_revision : f845161efa23a3c8c9f18f4febc7087347b0cff2

bin/xbps-digest/main.c

@@ -23,17 +23,11 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <sys/types.h>
-#include <sys/stat.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <unistd.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <assert.h>
-#include <inttypes.h>
-#include <libgen.h>
 
 #include <xbps_api.h>