Remove Nexus 6P expectations Bot decommissioned in crrev.com/c/2541579 Bug: chromium:1148989, angleproject:5280, angleproject:3726 Bug: angleproject:2641, angleproject:3264, angleproject:2114 Bug: angleproject:3464, angleproject:4991, angleproject:1415 Bug: angleproject:2407, angleproject:1427, angleproject:4215 Bug: angleproject:1429, angleproject:5069, chromium:998503 Change-Id: I1b268fdbcf6465aef447e90e470c1a011c7b3747 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2545892 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>