staging: unisys: include: remove unused ULTRA_CHANNELCLI_STRING

The inline ULTRA_CHANNELCLI_STRING is not being used so remove it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>