Copy AsciiExt methods to char directly

This is done in order to deprecate AsciiExt eventually.

src/librustdoc/html/markdown.rs

@@ -30,7 +30,6 @@
 use libc;
 use std::slice;
 
-use std::ascii::AsciiExt;
 use std::cell::RefCell;
 use std::collections::{HashMap, VecDeque};
 use std::default::Default;

src/librustdoc/lib.rs

@@ -23,7 +23,6 @@
 #![feature(test)]
 #![feature(unicode)]
 #![feature(vec_remove_item)]
-#![feature(ascii_ctype)]
 
 extern crate arena;
 extern crate getopts;

src/libstd/path.rs

@@ -77,7 +77,6 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use ascii::*;
 use borrow::{Borrow, Cow};
 use cmp;
 use error::Error;