quick installer: remove UPGRADE_MAPPINGS

Upgrade via quick installer is not supported anymore

utils/src/ooinstall/cli_installer.py

@@ -24,19 +24,6 @@ DEFAULT_ANSIBLE_CONFIG = '/usr/share/atomic-openshift-utils/ansible.cfg'
 QUIET_ANSIBLE_CONFIG = '/usr/share/atomic-openshift-utils/ansible-quiet.cfg'
 DEFAULT_PLAYBOOK_DIR = '/usr/share/ansible/openshift-ansible/'
 
-UPGRADE_MAPPINGS = {
-    '3.6': {
-        'minor_version': '3.6',
-        'minor_playbook': 'v3_6/upgrade.yml',
-        'major_playbook': 'v3_7/upgrade.yml',
-        'major_version': '3.7',
-    },
-    '3.7': {
-        'minor_version': '3.7',
-        'minor_playbook': 'v3_7/upgrade.yml',
-    },
-}
-
 
 def validate_ansible_dir(path):
     if not path: