Fix dvec-related fallout in tests

src/test/run-pass/call-closure-from-overloaded-op.rs

@@ -11,7 +11,7 @@
 fn foo() -> int { 22 }
 
 pub fn main() {
-    let x: ~[@fn() -> int] = ~[];
+    let mut x: ~[@fn() -> int] = ~[];
     x.push(foo);
     fail_unless!((x[0])() == 22);
 }

src/test/run-pass/issue-2631-b.rs

@@ -15,12 +15,11 @@ extern mod req;
 extern mod std;
 
 use req::*;
-use std::oldmap::*;
 use std::oldmap::HashMap;
 
 pub fn main() {
   let v = ~[@~"hi"];
   let m: req::header_map = HashMap();
-  m.insert(~"METHOD", @mut ~[v]);
+  m.insert(~"METHOD", @mut v);
   request::<int>(m);
 }

src/test/run-pass/issue-5275.rs

@@ -1,27 +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.
-
-fn foo(self: &A) -> int {
-    if true {
-        fail!()
-    } else {
-        *bar(self.bar)
-    }
-}
-
-pub fn main() {}
-
-fn bar(_: &r/mut int) -> &r/int {
-    fail!()
-}
-
-struct A {
-  bar: @mut int,
-}