Revert "Configure a new GITHUB_TOKEN generated by @lindner (#3110)" (#3117)
Revert "Configure a new GITHUB_TOKEN generated by @lindner (#3110)" (#3117)

This reverts commit fc29f24035b979e1d95116518a0489535dfdc39d.
PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs