Remove sqlite3 module

[nwf]

It's not clear that this ever worked, AFAICT nobody uses it, and it's an old version of the sqlite3 engine at this point. Absent a maintainer, let's just get rid of it after this master cuts (#3066).

"Fixes" #2913 and #2300

[TerryE]

If none of the other committers objects strongly, then I'll merge this in a day or so.

[nwf]

How about we cut master (and close #3066) and then merge this? Gives us time to back it out if someone does object.

[TerryE]

I feel that I need to do some extra work checking out telnet and FTP server against Dev before we cut to master, and I also feel that this and the cut to master are independent issues.

[HHHartmann]

I would also want to wait til after the master cut. That way we have our discontinuation note in the docs for one cycle.
OTOH nobody really seems to miss it really.

[marcelstoer]

I feel that I need to do some extra work checking out telnet and FTP server against Dev before we cut to master

👍

I would also want to wait til after the master cut.

👍

[marcelstoer]

Missing: removal of sqlite3.md from mkdocs.yml. Now fixed.