ffb865f3e0
Reason for revert:
Breaks downstream build.
Original issue's description:
> Delete unused code from systeminfo.
>
> BUG=webrtc:6906
>
> Review-Url: https://codereview.webrtc.org/2578323005
> Cr-Commit-Position: refs/heads/master@{#15655}
> Committed: 617ca316e9
TBR=perkj@webrtc.org,kthelgason@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6906
Review-Url: https://codereview.webrtc.org/2584563004 .
Cr-Commit-Position: refs/heads/master@{#15660}