Log Message:
x11/fltk2: Remove after updating last package that used it

FLTK 2 and FLTK 3 are branches that are no longer developed.
The current stable version is 1.3.5.
Current development takes place for 1.4.

If somebody has used x11/fltk2 for old non-pkgsrc software,
wip/fltk2 can be used instead. Snapshots are no longer provided,
the wip package is based on git now.

OK from wiz@.