lio: Remove unneeded include
Reviewed by: adiran, imp
Differential Revision: https://reviews.freebsd.org/D36501
(cherry picked from commit d819ddba9aa458f6e91df059426d9a2f1ac0b92d)
(cherry picked from commit 0d44c5ae3735fb8285fce7662adc86a21ce05768)