Remove unnecessary checkout step - workflow only needs API calls

Author: spbolton

.github/workflows/issue_comp_link-issue-to-pr.yml

@@ -34,11 +34,6 @@ jobs:
       GH_TOKEN: ${{ github.token }}
 
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
       - name: Debug workflow inputs
         run: |
           echo "PR Branch: ${{ inputs.pr_branch }}"