Remove X11BASE from here so the one from bsd.port.mk has a chance to set default. Grepping through src shows only gnu/usr.bin/groff which doesn't use it in src build and OpenSSH for which this was a NOOP.
Remove X11BASE from here so the one from bsd.port.mk has a chance to set
default. Grepping through src shows only gnu/usr.bin/groff which doesn't
use it in src build and OpenSSH for which this was a NOOP.

Discussed with:	des, ru
Approved by:	ru

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