inputcontrol: remove mouse CPI setting codes Since the mouse CPI is now handled via xorg conf files, there is no need to set it in inputcontrol scripts anymore. BUG=chromium:431114 TEST=N/A Change-Id: If0d48ea6b59e65860fa0348a33ebbb288e5527c5 Reviewed-on: https://chromium-review.googlesource.com/228381 Reviewed-by: Chung-yih Wang <[email protected]> Commit-Queue: Tai-Hsu Lin <[email protected]> Tested-by: Tai-Hsu Lin <[email protected]>