Revert "Merge pull request #19 from asgeirom/master"

This reverts commit 27ccb0947385d2384ad41e5ba47e35ae64df40d2, reversing
changes made to b7eccedf8a25248dd8cd1c04e940c4a7b7712dfe.
Revert this change because linux/time.h is a kernel header and is only used in kernel code.
https://stackoverflow.com/a/6917292