Remove unused set_scheme function, create all hostnames from a single function.
Remove unused set_scheme function, create all hostnames from a single function.

DualSpark/rust-aws,mattico/rusoto,rusoto/rusoto,mattico/rusoto,DualSpark/rust-aws,mattico/rusoto,DualSpark/rusoto,SecurityInsanity/rusoto,DualSpark/rusoto,SecurityInsanity/rusoto,rusoto/rusoto,rusoto/rusoto,DualSpark/rusoto,DualSpark/rust-aws