ioctl: Remove duplicated header files

Remove duplicated included header files in a file (nvme-ioctl.c)

Signed-off-by: Minwoo Im <[email protected]>

Author: minwooim

nvme-ioctl.c

@@ -1,11 +1,8 @@
 #include <assert.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>
-#include <string.h>
 #include <errno.h>
-#include <unistd.h>
 
-#include <errno.h>
 #include <getopt.h>
 #include <fcntl.h>
 #include <inttypes.h>