we use devtmpfs on all targets, no need for extra dev tmpfs

package/base-files/src/init

@@ -8,7 +8,6 @@ mount -o nosuid,nodev,noexec -t sysfs sysfs /sys
 	mount none /tmp -t tmpfs -o size=${size}k
 	mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
 }
-mount -o nosuid,size=128k,mode=0755 -t tmpfs mdev /dev
 mkdir /dev/pts /dev/shm
 mount -o nosuid,noexec -t devpts devpts /dev/pts
 exec 0<>/dev/console >&0 2>&0