[package] mtd: do not include error.h

We do not use anything from it, and it is not available with all libcs.
Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34294 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mtd/src/mtd.c

@@ -31,7 +31,6 @@
 #include <sys/syscall.h>
 #include <fcntl.h>
 #include <errno.h>
-#include <error.h>
 #include <time.h>
 #include <string.h>
 #include <sys/ioctl.h>