Remove deprecated flags

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/e2e-bootstrap.yaml

@@ -85,13 +85,6 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITPROVIDER_BOT_TOKEN }}
           GITHUB_REPO_NAME: ${{ steps.vars.outputs.test_repo_name }}
           GITHUB_ORG_NAME: fluxcd-testing
-      - name: libgit2
-        run: |
-          /tmp/flux create source git test-libgit2 \
-          --url=ssh://git@github.com/fluxcd-testing/${{ steps.vars.outputs.test_repo_name }} \
-          --git-implementation=libgit2 \
-          --secret-ref=flux-system \
-          --branch=main
       - name: uninstall
         run: |
           /tmp/flux uninstall -s --keep-namespace