staging: unisys: visorinput: remove erroneous 'FIXME' comments

These comments were mistakenly carried forward by a previous copy/paste.

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