Remove `DATABASE_URL_FOR_SCHEMA` from `.example.env`
Remove `DATABASE_URL_FOR_SCHEMA` from `.example.env`

This env var is no longer used, as we now run on persistent schema.

mcasper/diesel,sgrif/diesel,SoftwareWarlock/diesel,SoftwareWarlock/diesel,diesel-rs/diesel,diesel-rs/diesel,tohou/diesel,mcasper/diesel,tohou/diesel,sgrif/diesel,cascalheira/diesel,cascalheira/diesel