### Summary

The config option `DISPLAY_SKIPPED_HOSTS.env.0` should be removed from `lib/ansible/config/base.yml`. It was scheduled for removal in 2.12.

### Issue Type

Bug Report

### Component Name

`lib/ansible/config/base.yml`

### Ansible Version

2.14

### Configuration

N/A

### OS / Environment

N/A

### Steps to Reproduce

N/A

### Expected Results

N/A

### Actual Results

N/A
DOCUMENTATION = r'''
    options:
      display_skipped_hosts:
        name: Show skipped hosts
        description: "Toggle to control displaying skipped task/host results in a task"
        type: bool
        default: yes
        env:
          - name: DISPLAY_SKIPPED_HOSTS
            deprecated:
              why: environment variables without C(ANSIBLE_) prefix are deprecated
              version: "2.12"
              alternatives: the C(ANSIBLE_DISPLAY_SKIPPED_HOSTS) environment variable
          - name: ANSIBLE_DISPLAY_SKIPPED_HOSTS
        ini:
          - key: display_skipped_hosts
            section: defaults
      display_ok_hosts:
        name: Show 'ok' hosts
        description: "Toggle to control displaying 'ok' task/host results in a task"
        type: bool
        default: yes
        env:
          - name: ANSIBLE_DISPLAY_OK_HOSTS
        ini:
          - key: display_ok_hosts
            section: defaults
        version_added: '2.7'
      display_failed_stderr: