package/busybox: invert dependency with netcat

package/busybox: invert dependency with netcat

Since netcat would be installed before busybox, we don't need to remove
a pre-installed 'nc' anymore.

If another netcat implementation (e.g. netcat-openbsd) is also enabled,
there is no way to tell which would win in the end, especially when we
add TLPB, in which case that will be forbidden.

So, we don't need to remove anything anymore.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>