Revert "see if setup node will just use io.js for 1-3.x"

This reverts commit 0fe828f.

Author: jonchurch

.github/workflows/experimental.ci.yaml

@@ -74,9 +74,6 @@ jobs:
         node-version:
           - "0.10.x"
           - "0.12.x"
-          - "1.x"
-          - "2.x"
-          - "3.x"
           - "4.x"
           - "5.x"
           - "6.x"