Remove deprecation warnings

Author: jyn514

src/web/error.rs

@@ -14,20 +14,16 @@ pub enum Nope {
 
 impl fmt::Display for Nope {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(self.description())
-    }
-}
-
-impl Error for Nope {
-    fn description(&self) -> &str {
-        match *self {
+        f.write_str(match *self {
             Nope::ResourceNotFound => "Requested resource not found",
             Nope::CrateNotFound => "Requested crate not found",
             Nope::NoResults => "Search yielded no results",
-        }
+        })
     }
 }
 
+impl Error for Nope {}
+
 impl Handler for Nope {
     fn handle(&self, req: &mut Request) -> IronResult<Response> {
         match *self {

src/web/mod.rs

@@ -48,7 +48,6 @@ mod routes;
 pub(crate) mod metrics;
 
 use std::{env, fmt};
-use std::error::Error;
 use std::time::Duration;
 use std::path::PathBuf;
 use std::net::SocketAddr;
@@ -98,7 +97,7 @@ impl CratesfyiHandler {
 
         // load templates
         if let Err(e) = hbse.reload() {
-            panic!("Failed to load handlebar templates: {}", e.description());
+            panic!("Failed to load handlebar templates: {}", e);
         }
 
         let mut chain = Chain::new(base);