refactor: remove unnecessary Cow::Borrowed wrapper in URL query parsing (#696)

Signed-off-by: Xiaobo Liu <[email protected]>

Author: cppcoffee

ice/src/url/mod.rs

@@ -1,7 +1,6 @@
 #[cfg(test)]
 mod url_test;
 
-use std::borrow::Cow;
 use std::convert::From;
 use std::fmt;
 
@@ -190,7 +189,7 @@ impl Url {
                     return Err(Error::ErrInvalidQuery);
                 }
                 if let Some((key, value)) = q_args.next() {
-                    if key == Cow::Borrowed("transport") {
+                    if key == "transport" {
                         let proto: ProtoType = value.as_ref().into();
                         if proto == ProtoType::Unknown {
                             return Err(Error::ErrProtoType);
@@ -208,7 +207,7 @@ impl Url {
                     return Err(Error::ErrInvalidQuery);
                 }
                 if let Some((key, value)) = q_args.next() {
-                    if key == Cow::Borrowed("transport") {
+                    if key == "transport" {
                         let proto: ProtoType = value.as_ref().into();
                         if proto == ProtoType::Unknown {
                             return Err(Error::ErrProtoType);