Fix fallout of changing the expansion of `#[deriving(PartialEq)]`

src/libcore/option.rs

@@ -143,7 +143,7 @@
 
 #![stable]
 
-use cmp::{PartialEq, Eq, Ord};
+use cmp::{Eq, Ord};
 use default::Default;
 use iter::{Iterator, DoubleEndedIterator, FromIterator, ExactSize};
 use mem;

src/libcore/result.rs

@@ -276,7 +276,6 @@
 
 #![stable]
 
-use cmp::PartialEq;
 use std::fmt::Show;
 use slice;
 use slice::AsSlice;

src/libcore/str.rs

@@ -19,8 +19,7 @@
 use mem;
 use char;
 use char::Char;
-use cmp;
-use cmp::{PartialEq, Eq};
+use cmp::{Eq, mod};
 use default::Default;
 use iter::{Map, Iterator};
 use iter::{DoubleEndedIterator, ExactSize};

src/libgetopts/lib.rs

@@ -93,7 +93,6 @@
 
 #[cfg(test)] #[phase(plugin, link)] extern crate log;
 
-use std::cmp::PartialEq;
 use std::fmt;
 use std::result::{Err, Ok};
 use std::result;