fix various warnings

src/test/bench/shootout-pfib.rs

@@ -28,7 +28,6 @@ use std::io;
 use std::os;
 use std::result::{Ok, Err};
 use std::task;
-use std::u64;
 use std::uint;
 
 fn fib(n: int) -> int {

src/test/run-pass/const-cross-crate-extern.rs

@@ -13,11 +13,8 @@
 
 extern mod cci_const;
 use cci_const::bar;
-use std::cast::transmute;
 static foo: extern "C" fn() = bar;
 
 pub fn main() {
-    unsafe {
-        assert_eq!(foo, bar);
-    }
+    assert_eq!(foo, bar);
 }

src/test/run-pass/const-extern-function.rs

@@ -18,8 +18,6 @@ struct S {
 }
 
 pub fn main() {
-    unsafe {
-        assert_eq!(foopy, f);
-        assert_eq!(f, s.f);
-    }
+    assert_eq!(foopy, f);
+    assert_eq!(f, s.f);
 }

src/test/run-pass/extern-compare-with-return-type.rs

@@ -15,7 +15,7 @@ extern fn voidret2() {}
 
 extern fn uintret() -> uint { 22 }
 
-extern fn uintvoidret(x: uint) {}
+extern fn uintvoidret(_x: uint) {}
 
 extern fn uintuintuintuintret(x: uint, y: uint, z: uint) -> uint { x+y+z }
 

src/test/run-pass/extern-take-value.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::cast::transmute;
-
 extern fn f() {
 }
 
@@ -17,12 +15,10 @@ extern fn g() {
 }
 
 pub fn main() {
-    unsafe {
-        let a: extern "C" fn() = f;
-        let b: extern "C" fn() = f;
-        let c: extern "C" fn() = g;
+    let a: extern "C" fn() = f;
+    let b: extern "C" fn() = f;
+    let c: extern "C" fn() = g;
 
-        assert_eq!(a, b);
-        assert!(a != c);
-    }
+    assert_eq!(a, b);
+    assert!(a != c);
 }

src/test/run-pass/issue-5917.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::io;
-
 struct T (&'static [int]);
 static t : T = T (&'static [5, 4, 3]);
 fn main () {

src/test/run-pass/monad.rs

@@ -10,8 +10,6 @@
 
 // xfail-fast
 
-use std::int;
-
 trait vec_monad<A> {
     fn bind<B>(&self, f: &fn(&A) -> ~[B]) -> ~[B];
 }

src/test/run-pass/reflect-visit-data.rs

@@ -10,7 +10,6 @@
 
 // xfail-fast
 
-use std::int;
 use std::libc::c_void;
 use std::ptr;
 use std::sys;

src/test/run-pass/static-impl.rs

@@ -10,8 +10,6 @@
 
 // xfail-fast
 
-use std::uint;
-
 pub trait plus {
     fn plus(&self) -> int;
 }

src/test/run-pass/trait-generic.rs

@@ -10,8 +10,6 @@
 
 // xfail-fast
 
-use std::int;
-
 trait to_str {
     fn to_string(&self) -> ~str;
 }