Remove support for sqlite url prefix

[pimeys]

Merge only when Prisma 4 is due

Part of: prisma/prisma#11468

[janpio]

There is another case I think:

quaint/src/single.rs

Line 134 in 8be4fab

s if s.starts_with("file") || s.starts_with("sqlite") => {

[pimeys]

There is another case I think:

quaint/src/single.rs

Line 134 in 8be4fab

s if s.starts_with("file") || s.starts_with("sqlite") => {

I didn't save that file before committing...

[janpio]

see comments