target/generic/mini: remove udhcpc default.script entry

It isn't provided in the target skeleton, and avahi gets the
permissions correct so it isn't needed and just confuses users.

target/generic/mini_device_table.txt

@@ -50,7 +50,6 @@
 /etc/network/if-pre-up.d		d	755	0	0	-	-	-	-	-
 /etc/network/if-down.d			d	755	0	0	-	-	-	-	-
 /etc/network/if-post-down.d		d	755	0	0	-	-	-	-	-
-/usr/share/udhcpc/default.script	f	755	0	0	-	-	-	-	-
 # uncomment this to allow starting x as non-root
 #/usr/X11R6/bin/Xfbdev		f	4755	0	0	-	-	-	-	-
 # Normal system devices