Remove structures now found in kernel headers.

The new v4.20.1 kernel headers have the definitions, so remove the
duplicates.

Test: Builds.
Change-Id: I6ba3e7589f3abd66aec6dcda498d990012d64b11
Merged-In: I6ba3e7589f3abd66aec6dcda498d990012d64b11
(cherry picked from commit 969e1524cc398a7ddb3d841f649f138f25d1a58f)
1 file changed