Revert "Bug 1488789 - provide taskcluster credentials for use with tc-pulse"
Revert "Bug 1488789 - provide taskcluster credentials for use with tc-pulse"

This reverts commit 66f7ffd1d4d04a22b7394bfb249f1d947d00b971.

djmitche/taskcluster-auth,taskcluster/taskcluster-auth