editors/emacs,emacs-devel: After nox flavor, remove X11 option

[jrm]

Summary

PR:
Submitted by:
Reported by:

Test Plan

poudriere testport 10/11 i386/amd64 all flavors

[mat]

editors/emacs/Makefile

157

The default flavor can be the empty flavor, so either write ${FLAVOR:U${FLAVORS:[1]}} instead of ${FLAVOR:U}, or add a FLAVOR?= ${FLAVORS:[1]}` after the FLAVORS line.

[jrm]

Handle an empty flavor.

[jrm]

Committed, but forgot to add the review in the commit log.