busybox: no need to disable clear and reset

busybox: no need to disable clear and reset

Removing clear and reset from the busybox config when the ncurses tools
are enabled is not really needed.

Since commit 802bff9c42, the busybox install will not overwrite
existing programs. Therefore, the tools will be installed correctly
regardless of the order of the build:
- if busybox is built first, the clear and reset apps are installed,
  but they will be overwritten by ncurses;
- if ncurses is built first, it will install the clear and reset apps,
  and busybox will no longer install them.

We prefer not to modify the busybox configuration when not strictly
necessary, because it is surprising for the user that his configuration
is not applied. Clearly, it's not ideal that busybox is configured with
redundant apps, but if the user wants to shrink it, it's possible to
provide a custom config.

This partially reverts commit 33c72344a8686a136c1da6a056ed6c0945bbf8b7.

Cc: Matthew Weber <matthew.weber@rockwellcollins.com>
Cc: Danomi Manchego <danomimanchego123@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Matt Weber  <matthew.weber@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>