### 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
name: Use STDERR for failed and unreachable tasks
        description: "Toggle to control whether failed and unreachable tasks are displayed to STDERR (vs. STDOUT)"
        type: bool
        default: no
        env:
          - name: ANSIBLE_DISPLAY_FAILED_STDERR
        ini:
          - key: display_failed_stderr
            section: defaults
        version_added: '2.7'
      show_custom_stats:
        name: Show custom stats
        description: 'This adds the custom stats set via the set_stats plugin to the play recap'
        type: bool
        default: no
        env:
          - name: ANSIBLE_SHOW_CUSTOM_STATS
        ini:
          - key: show_custom_stats
            section: defaults
      show_per_host_start:
        name: Show per host task start
        description: 'This adds output that shows when a task is started to execute for each host'
        type: bool
        default: no
        env:
          - name: ANSIBLE_SHOW_PER_HOST_START
        ini:
          - key: show_per_host_start
            section: defaults