Remove deprecated (and removed in 1.19) flag and function --basic-auth-file (#6655)

roles/kubernetes/master/tasks/main.yml

@@ -3,10 +3,6 @@
   tags:
     - k8s-pre-upgrade
 
-- import_tasks: users-file.yml
-  when:
-    - kube_basic_auth|default(true)
-
 - name: Create webhook token auth config
   template:
     src: webhook-token-auth-config.yaml.j2

roles/kubernetes/master/tasks/users-file.yml

@@ -1,14 +0,0 @@
----
-- name: Make sure the users directory exits
-  file:
-    path: "{{ kube_users_dir }}"
-    state: directory
-    mode: o-rwx
-    group: "{{ kube_cert_group }}"
-
-- name: Populate users for basic auth in API
-  template:
-    src: known_users.csv.j2
-    dest: "{{ kube_users_dir }}/known_users.csv"
-    mode: 0640
-    backup: yes