cleanup unused url_parser internals

`Hostname` was previously public, but technically wasn't accessible
since it was in a private module.

Author: antonok-edm

src/url_parser/parser.rs

@@ -32,14 +32,13 @@ pub(crate) const USERINFO: &AsciiSet = &PATH
     .add(b'|');
 
 #[derive(Clone)]
-pub struct Hostname {
+pub(super) struct Hostname {
     serialization: String,
 
     // Components
-    pub scheme_end: usize,   // Before ':'
-    pub username_end: usize, // Before ':' (if a password is given) or '@' (if not)
-    pub host_start: usize,
-    pub host_end: usize,
+    pub(super) scheme_end: usize,   // Before ':'
+    pub(super) host_start: usize,
+    pub(super) host_end: usize,
 }
 
 impl Hostname {
@@ -388,7 +387,6 @@ impl Parser {
         }
         // Anarchist URL (no authority)
         let path_start = self.serialization.len();
-        let username_end = path_start;
         let host_start = path_start;
         let host_end = path_start;
         self.serialization.push_str(input.chars.as_str());
@@ -401,7 +399,6 @@ impl Parser {
         Ok(Hostname {
             serialization: self.serialization,
             scheme_end,
-            username_end,
             host_start,
             host_end,
         })
@@ -415,15 +412,14 @@ impl Parser {
     ) -> ParseResult<Hostname> {
         self.serialization.push_str("//");
         // authority state
-        let (username_end, remaining) = self.parse_userinfo(input, scheme_type)?;
+        let (_username_end, remaining) = self.parse_userinfo(input, scheme_type)?;
         // host state
         let host_start = self.serialization.len();
         let (host_end, remaining) = self.parse_host(remaining, scheme_type)?;
         self.serialization.push_str(remaining.chars.as_str());
         Ok(Hostname {
             serialization: self.serialization,
             scheme_end,
-            username_end,
             host_start,
             host_end,
         })