diff --git a/components/net/hsts.rs b/components/net/hsts.rs
index f540955b05a..2af1c01099e 100644
--- a/components/net/hsts.rs
+++ b/components/net/hsts.rs
@@ -10,7 +10,6 @@ use std::collections::HashMap;
 use std::net::{Ipv4Addr, Ipv6Addr};
 use std::str::from_utf8;
 use time;
-use url::Url;
 
 #[derive(Clone, Deserialize, Serialize)]
 pub struct HstsEntry {
@@ -136,15 +135,3 @@ impl HstsList {
         }
     }
 }
-
-pub fn secure_url(url: &Url) -> Url {
-    if url.scheme() == "http" {
-        let mut secure_url = url.clone();
-        secure_url.set_scheme("https").unwrap();
-        // .set_port(Some(443)) would set the port to None,
-        // and should only be done when it was already None.
-        secure_url
-    } else {
-        url.clone()
-    }
-}
diff --git a/tests/unit/net/hsts.rs b/tests/unit/net/hsts.rs
index 1ae94f07721..34913354ac1 100644
--- a/tests/unit/net/hsts.rs
+++ b/tests/unit/net/hsts.rs
@@ -3,7 +3,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use net::hsts::{HstsEntry, HstsList};
-use net::hsts::secure_url;
 use net_traits::IncludeSubdomains;
 use std::collections::HashMap;
 use time;
@@ -294,27 +293,3 @@ fn test_preload_hsts_domains_well_formed() {
     let hsts_list = HstsList::from_servo_preload();
     assert!(!hsts_list.entries_map.is_empty());
 }
-
-#[test]
-fn test_secure_url_does_not_change_explicit_port() {
-    let url = Url::parse("http://mozilla.org:8080/").unwrap();
-    let secure = secure_url(&url);
-
-    assert!(secure.port().unwrap() == 8080u16);
-}
-
-#[test]
-fn test_secure_url_does_not_affect_non_http_schemas() {
-    let url = Url::parse("file://mozilla.org").unwrap();
-    let secure = secure_url(&url);
-
-    assert_eq!(secure.scheme(), "file");
-}
-
-#[test]
-fn test_secure_url_forces_an_http_host_in_list_to_https() {
-    let url = Url::parse("http://mozilla.org").unwrap();
-    let secure = secure_url(&url);
-
-    assert_eq!(secure.scheme(), "https");
-}