Fix deprecation and stablization warnings

The question mark feature was stablized and the Reflect marker trait was deprecated

ctru-sys/src/lib.rs

@@ -6,7 +6,6 @@
  */
 
 #![no_std]
-#![feature(question_mark)]
 #![allow(non_camel_case_types, non_snake_case, overflowing_literals)]
 
 pub mod console;

src/error.rs

@@ -53,7 +53,6 @@ use core::any::TypeId;
 use core::cell;
 use rustc_unicode::char;
 use core::fmt::{self, Debug, Display};
-use core::marker::Reflect;
 use core::mem::transmute;
 use core::num;
 use core::str;
@@ -61,7 +60,7 @@ use collections::string::{self, String};
 use alloc::boxed::Box;
 
 /// Base functionality for all errors in Rust.
-pub trait Error: Debug + Display + Reflect {
+pub trait Error: Debug + Display {
     /// A short description of the error.
     ///
     /// The description should not contain newlines or sentence-ending

src/io/buffered.rs

@@ -12,7 +12,6 @@
 
 use io::prelude::*;
 
-use core::marker::Reflect;
 use core::cmp;
 use error;
 use core::fmt;
@@ -557,7 +556,7 @@ impl<W> From<IntoInnerError<W>> for Error {
     fn from(iie: IntoInnerError<W>) -> Error { iie.1 }
 }
 
-impl<W: Reflect + Send + fmt::Debug> error::Error for IntoInnerError<W> {
+impl<W: Send + fmt::Debug> error::Error for IntoInnerError<W> {
     fn description(&self) -> &str {
         error::Error::description(self.error())
     }

src/lib.rs

@@ -3,8 +3,6 @@
 #![feature(char_escape_debug)]
 #![feature(int_error_internals)]
 #![feature(lang_items)]
-#![feature(question_mark)]
-#![feature(reflect_marker)]
 #![feature(slice_patterns)]
 #![feature(str_internals)]
 #![feature(try_from)]