Backed out changeset b25884891abc (bug 1577664) for causing Gecko decision task failure CLOSED TREE

taskcluster/ci/toolchain/misc.yml

@@ -92,7 +92,6 @@ linux64-mar-tools:
         toolchain-artifact: public/build/mar-tools.tar.xz
         resources:
             - build/moz.configure
-            - 'config/milestone.txt'
             - mfbt
             - modules/libmar/
             - moz.configure