CI: Remove Flatcar specifics

We don't test Flatcar at all in CI, thus remove special handling for it.

tests/testcases/030_check-network.yml

@@ -4,17 +4,9 @@
   vars:
     test_image_repo: registry.k8s.io/e2e-test-images/agnhost
     test_image_tag: "2.40"
+    bin_dir: "/usr/local/bin"
 
   tasks:
-  - name: Force binaries directory for Flatcar Container Linux by Kinvolk
-    set_fact:
-      bin_dir: "/opt/bin"
-    when: ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
-
-  - name: Force binaries directory for other hosts
-    set_fact:
-      bin_dir: "/usr/local/bin"
-    when: not ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
 
   - name: Check kubelet serving certificates approved with kubelet_csr_approver
     when:
@@ -102,7 +94,7 @@
 
   - name: Check that all pods are running and ready
     vars:
-      pods: "{{ (pods_json | from_json)['items'] }}"
+      pods: "{{ (pods_json.stdout | from_json)['items'] }}"
     block:
     - name: Check Deployment is ready
       command: "{{ bin_dir }}/kubectl rollout status deploy --namespace test agnhost --timeout=180s"