Merge pull request #3814 from edx/jbarciauskas/fixes-to-vagrant-devstack-post-docker-merge

Remove reference to nginx var where nginx role isn't used

playbooks/roles/edxapp/defaults/main.yml

@@ -685,8 +685,6 @@ edxapp_git_identity: "{{ edxapp_app_dir }}/edxapp-git-identity"
 edxapp_git_ssh: "/tmp/edxapp_git_ssh.sh"
 
 edxapp_devstack_logs:
-  - "{{ nginx_log_dir }}/access.log"
-  - "{{ nginx_log_dir }}/error.log"
   - "{{ supervisor_log_dir }}/cms-stdout.log"
   - "{{ supervisor_log_dir }}/cms-stderr.log"
   - "{{ supervisor_log_dir }}/lms-stdout.log"