This reverts commit 711f475966.
Revert "Bug 1977950 - Add isolated-process variants to taskcluster tasks. r=geckoview-reviewers,taskgraph-reviewers,ohall,ahal"
This reverts commit 4826c013d5.
Revert "Bug 1977950 - Add --enable-isolated-process to run unit tests with isolated process modde, not using build options. r=jmaher,geckoview-reviewers,ohall"
This reverts commit cf6d95fb4e.