Remove unneeded to_string filter

Author: GuillaumeGomez

src/web/page/templates.rs

@@ -92,7 +92,6 @@ pub mod filters {
     use chrono::{DateTime, Utc};
     use rinja::filters::Safe;
     use std::borrow::Cow;
-    use std::fmt;
 
     // Copied from `tera`.
     pub fn escape_html(input: &str) -> rinja::Result<Cow<'_, str>> {
@@ -251,10 +250,6 @@ pub mod filters {
         Ok(value.split(pat).next())
     }
 
-    pub fn to_string<T: fmt::Display>(value: &T) -> rinja::Result<String> {
-        Ok(value.to_string())
-    }
-
     pub fn json_encode<T: ?Sized + serde::Serialize>(value: &T) -> rinja::Result<String> {
         Ok(serde_json::to_string(value).expect("`encode_json` failed"))
     }

templates/rustdoc/topbar.html

@@ -36,7 +36,7 @@
                         <span id="clipboard" class="fa-svg fa-svg-fw" title="Copy crate name and version information">{%- include "clipboard.svg" -%}</span>
                     </li>
 
-                    {%- if metadata.req_version|to_string == "latest" -%}
+                    {%- if metadata.req_version.to_string() == "latest" -%}
                     <li class="pure-menu-item">
                         <a href="{% if permalink_path is defined %}{{permalink_path|safe}}{% endif %}" class="pure-menu-link description" id="permalink" title="Get a link to this specific version">
                             {{ "link"|fas(false, false, "") }} Permalink