style(proto): remove explicit_iter_loop lint (#4089)

Author: josetorrs

Cargo.toml

@@ -123,7 +123,6 @@ decimal_literal_representation = "allow" # TODO: consider
 default_trait_access = "allow"
 else_if_without_else = "allow"
 enum_glob_use = "allow"
-explicit_iter_loop = "allow" # TODO: easy fix
 float_arithmetic = "allow"
 ignored_unit_patterns = "allow"
 indexing_slicing = "allow"

src/proto/h1/decode.rs

@@ -649,7 +649,7 @@ fn decode_trailers(buf: &mut BytesMut, count: usize) -> Result<HeaderMap, io::Er
     let res = httparse::parse_headers(buf, &mut headers);
     match res {
         Ok(httparse::Status::Complete((_, headers))) => {
-            for header in headers.iter() {
+            for header in headers {
                 use std::convert::TryFrom;
                 let name = match HeaderName::try_from(header.name) {
                     Ok(name) => name,