auto merge of #5284 : thestinger/rust/iter-trait, r=brson

I missed this when I replaced iter-trait with a `BaseIter` impl.

src/libcore/iter-trait/option.rs

@@ -1,32 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-mod inst {
-    use option::{None, Option, Some};
-
-    #[allow(non_camel_case_types)]
-    pub type IMPL_T<A> = Option<A>;
-
-    #[inline(always)]
-    pub pure fn EACH<A>(self: &IMPL_T<A>, f: fn(v: &A) -> bool) {
-        match *self {
-            None => (),
-            Some(ref a) => { f(a); }
-        }
-    }
-
-    #[inline(always)]
-    pub pure fn SIZE_HINT<A>(self: &IMPL_T<A>) -> Option<uint> {
-        match *self {
-            None => Some(0),
-            Some(_) => Some(1)
-        }
-    }
-}