Remove unused env var

Author: ellisvalentiner

.github/workflows/release.yml

@@ -20,8 +20,6 @@ jobs:
       packages: write
       attestations: write
       id-token: write
-    env:
-      IMAGE_NAME: ${{ github.repository }}
     steps:
       - name: Log in to Docker Hub
         uses: docker/login-action@v3