Remove workflow run references from coverage workflow

Author: KurtWagner

.github/workflows/coverage.yml

@@ -17,16 +17,14 @@ on:
       - '.github/workflows/coverage.yml'
 jobs:
   coverage:
-    if: github.event.workflow_run.conclusion == 'success' && github.repository_owner == 'KurtWagner'
+    if: github.repository_owner == 'KurtWagner'
     # Can't use 24 - see https://github.com/SimonKagstrom/kcov/issues/473
     runs-on: ubuntu-22.04
     name: Test coverage
     timeout-minutes: 3
     steps:
       - name: "Checkout repo"
         uses: actions/checkout@v4
-        with:
-          ref: ${{ github.event.workflow_run.head_branch }}
 
       - name: "Setup zig environment"
         uses: mlugg/setup-zig@v2