get rid of doxygen.torproject.org

We have https://doxygen.torproject.org/ but it appears unmaintained.

We should shut it down, put it offline, and whatever else is needed to make it gone.

added component::internal services/tor sysadmin team priority::medium resolution::fixed status::closed type::defect labels

No, we most definitely should not, unless a superior replacement is available.

Trac:
Status: new to closed
Resolution: N/A to invalid

Trac:
Status: closed to reopened
Resolution: invalid to N/A

No, sorry, we should do this.

Other people are welcome to set up their own doxygen websites for the Tor code.

But we don't have one. And we don't have anybody who is doing it.

Trac:
Status: reopened to new

Trac:
Status: new to closed
Resolution: N/A to fixed

closed