Remove most expired ports that depend on Python 2.7:
Exceptions are:
- mail/mailman, our listservers still use it
- www/chromium, solely because of popular demand,
upstream is (slowly) working on porting it to Python 3
- ports that have actual patches for Python 3 against
them (Cinnamon and a few unrelated other ports)
- llvm70 and qt5-webengine because they seem to have a lot
of dependencies which need further analysis
- sysutils/uefi-edk2-bhyve because bhyve seems to use them
- python2 and python27 themselves
I'm sure there will be complaints, but the nice thing about
a version control system is that we can revert and adjust things.
(Only the first 15 lines of the commit message are shown above )
