src: Remove all unused sys/mman.h inclusions

Remove leftover inclusions of the sys/mman header file.

Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/v4l2_videodevice.cpp

@@ -13,7 +13,6 @@
 #include <sstream>
 #include <string.h>
 #include <sys/ioctl.h>
-#include <sys/mman.h>
 #include <sys/syscall.h>
 #include <sys/time.h>
 #include <unistd.h>