Revert "Workflow documentation is now in infra-manual"

This reverts commit ce8f827918f7768774fb58c58223471e893cf1d0.

Turns out there are a _few_ projects where the contribution links
weren't specific to developer contribution. Such as this one.

Change-Id: I1839fcf487ba1f8ae3a77fe4a711ffd4767b1a88