Remove now-unused fs import
Remove now-unused fs import

chris-morgan/rust-http,servo/rust-http,servo/rust-http,Shraddha512/rust-http,Shraddha512/rust-http,Shraddha512/rust-http,chris-morgan/rust-http,Shraddha512/rust-http,servo/rust-http,chris-morgan/rust-http,chris-morgan/rust-http,Shraddha512/rust-http,servo/rust-http