Removed try_trait and some formatting, particularly around imports

src/error.rs

@@ -41,7 +41,6 @@ use reqwest::Error as ReqErr;
 use serde_json::{Error as SerdeErr, Value};
 use std::io::Error as IOErr;
 
-use std::option::NoneError as NoneErr;
 use std::time::SystemTimeError as TimeErr;
 use u2f::u2ferror::U2fError as U2fErr;
 use yubico::yubicoerror::YubicoError as YubiErr;
@@ -84,13 +83,6 @@ make_error! {
     FromStrError(FromStrErr): _has_source, _api_error,
 }
 
-// This is implemented by hand because NoneError doesn't implement neither Display nor Error
-impl From<NoneErr> for Error {
-    fn from(_: NoneErr) -> Self {
-        Error::from(("NoneError", String::new()))
-    }
-}
-
 impl std::fmt::Debug for Error {
     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
         match self.source() {