Reason for revert: The machine seems healthy again. Original issue's description: > CQ: Remove android_arm64_rel trybot > > The bot is having problems again. > > NOTRY=true > BUG=634266 > TBR=ehmaldonado@webrtc.org > > Committed: https://crrev.com/24ee05016ccb1c1ea05c4b646fb29e2cefbfe439 > Cr-Commit-Position: refs/heads/master@{#13874} TBR=ehmaldonado@webrtc.org NOTRY=true BUG=634266 Review-Url: https://codereview.webrtc.org/2277263002 Cr-Commit-Position: refs/heads/master@{#13923}