Revisit the bundled sqlite library

[linuxfood]

I was just looking over things since #26 was raised, and thinking that the bundled sqlite should probably either be removed or updated, since it was last updated a year ago, and I know there have been quite a few updates since then.

[kud1ing]

I had the impression that sqlite3.c is currently not used anyway since there is no Makefile compiling and linking it,
and that a system-wide libsqlite* is dynamically linked.

[linuxfood]

Oh dear. It seems it really has been a long time since I mucked around with the code.
It used to have this hilarious little hack that would pass in sqlite.c in the build parameters in sqlite.rc I'm sure you can see in the history somewhere. Anyhoo, since it's not used anymore, consider this a request to nuke it.

[kud1ing]

Do you mean #[nolink] #[link_args = "sqlite3.c"]?

[linuxfood]

Yeah, that's the one, but it obviously hasn't been working in awhile.

[kud1ing]

I think that should still work.

But: my understanding is that this trick works because we are linking with cc. This might change in the future: rust-lang/rust#1300

[kud1ing]

Removed in #33
We can add an up-to-date version at a later point in time.