admin: removing credential to obtain 404 error

When the users endpoint doesn't need auth, but if the credential are
  incorrect it return a code 401. Not adding 401 as expected status_code
  to avoid confusion in case of wrong credential with existing user

Signed-off-by: Alexis Pentori <alexis@status.im>

tasks/admin.yml

@@ -10,9 +10,6 @@
     url: '{{ gitea_app_cont_web_url }}/api/v1/users/{{ gitea_app_admin_user }}'
     status_code: [200, 404]
     return_content: true
-    user: '{{ gitea_app_admin_user | mandatory }}'
-    password: '{{ gitea_app_admin_pass | mandatory }}'
-    force_basic_auth: true
   register: gitea_admin_user_raw
 
 - name: Create main Gitea admin user