Remove unused step

Author: michaelmckinsey1

.github/workflows/ci.yml

@@ -100,9 +100,6 @@ jobs:
             diffpackages:
               - 'repo/**/package.py'
 
-      - name: Fetch develop branch
-        run: git fetch origin develop:develop
-
       - name: Get modified directories in repo/
         id: get_modified_repo_dirs
         run: |