fix: remove unused Flux CLI install from deploy workflow

The deploy pipeline never uses the flux binary after installation, so the
GitHub release download only adds a flaky failure point. Remove the step and
keep the bootstrap path kubectl-only.

.gitea/workflows/deploy.yml

@@ -241,12 +241,6 @@ jobs:
           curl -fsSL -o /usr/local/bin/kubectl "https://dl.k8s.io/release/$(curl -fsSL https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
           chmod +x /usr/local/bin/kubectl
 
-      - name: Install flux CLI
-        run: |
-          curl -fsSL https://github.com/fluxcd/flux2/releases/download/v2.5.1/flux_2.5.1_linux_amd64.tar.gz | tar xz -C /tmp
-          mv /tmp/flux /usr/local/bin/flux
-          chmod +x /usr/local/bin/flux
-
       - name: Rewrite kubeconfig for runner-reachable API
         working-directory: terraform
         run: |