Fix more tests

Author: fdrinck

src/test/run-pass/binding/match-arm-statics.rs

@@ -45,8 +45,6 @@ pub mod glfw {
 }
 
 fn issue_6533() {
-    use glfw;
-
     fn action_to_str(state: glfw::InputState) -> &'static str {
         use glfw::{RELEASE, PRESS, REPEAT};
         match state {

src/test/run-pass/ifmt.rs

@@ -238,7 +238,6 @@ pub fn main() {
 // Basic test to make sure that we can invoke the `write!` macro with an
 // fmt::Write instance.
 fn test_write() {
-    use std::fmt::Write;
     let mut buf = String::new();
     write!(&mut buf, "{}", 3);
     {
@@ -267,7 +266,6 @@ fn test_print() {
 // Just make sure that the macros are defined, there's not really a lot that we
 // can do with them just yet (to test the output)
 fn test_format_args() {
-    use std::fmt::Write;
     let mut buf = String::new();
     {
         let w = &mut buf;

src/test/run-pass/invalid_const_promotion.rs

@@ -25,7 +25,6 @@ fn foo() {
 #[cfg(unix)]
 fn check_status(status: std::process::ExitStatus)
 {
-    use libc;
     use std::os::unix::process::ExitStatusExt;
 
     assert!(status.signal() == Some(libc::SIGILL)

src/test/run-pass/issues/issue-38556.rs

@@ -9,6 +9,5 @@ macro_rules! reexport {
 reexport!();
 
 fn main() {
-    use Bar;
     fn f(_: Bar) {}
 }

src/test/run-pass/issues/issue-39367.rs

@@ -15,7 +15,6 @@ fn arena() -> &'static ArenaSet<Vec<u8>> {
         fn require_sync<T: Sync>(_: &T) { }
         unsafe fn __stability() -> &'static ArenaSet<Vec<u8>> {
             use std::mem::transmute;
-            use std::boxed::Box;
             static mut DATA: *const ArenaSet<Vec<u8>> = 0 as *const ArenaSet<Vec<u8>>;
 
             static mut ONCE: Once = ONCE_INIT;

src/test/run-pass/out-of-stack.rs

@@ -36,7 +36,6 @@ fn loud_recurse() {
 #[cfg(unix)]
 fn check_status(status: std::process::ExitStatus)
 {
-    use libc;
     use std::os::unix::process::ExitStatusExt;
 
     assert!(!status.success());

src/test/run-pass/rfcs/rfc-2126-extern-absolute-paths/basic.rs

@@ -7,7 +7,6 @@
 use xcrate::Z;
 
 fn f() {
-    use xcrate;
     use xcrate as ycrate;
     let s = xcrate::S;
     assert_eq!(format!("{:?}", s), "S");

src/test/run-pass/traits/traits-multidispatch-infer-convert-target.rs

@@ -28,7 +28,6 @@ where T : Convert<U>
 }
 
 fn main() {
-    use std::default::Default;
     // T = i16, U = u32
     test(22_i16, Default::default(),  2, 4);