CI config update

.github/workflows/main.yml

@@ -4,7 +4,6 @@ on:
   push:
     branches:
       - master
-      - dev
   pull_request:
     types: [opened, synchronize, reopened]
 jobs:
@@ -47,7 +46,7 @@ jobs:
           python3 setup.py egg_info
       - name: Lint check
         run: |
-          cardboardlinter --refspec main -n auto
+          cardboardlinter -n auto
       - name: Unit tests
         run: nosetests tests --nocapture --processes=0 --process-timeout=20 --process-restartworker
       - name: Test scripts