Only support 3.0

Author: harryadel

.github/workflows/testsuite.yml

@@ -12,8 +12,6 @@ jobs:
     strategy:
       matrix:
         meteorRelease:
-          - "--release 2.8.1"
-          - "--release 2.15"
           - "--release 3.0-rc.4"
           # Latest version
     steps: