fixup! chore: remove unused import and unexpected cfg warnings

change warn level to forbid

Author: enigbe

rust/api/Cargo.toml

@@ -19,4 +19,4 @@ reqwest =  { version = "0.11.13", default-features = false, features = ["rustls-
 _test_utils =["rand"]
 
 [lints.rust]
-unexpected_cfgs = { level = "warn", check-cfg = ['cfg(genproto)'] }
+unexpected_cfgs = { level = "forbid", check-cfg = ['cfg(genproto)'] }