Use #[prelude_import] in libstd.

Author: jseyfried

src/libstd/ascii.rs

@@ -12,8 +12,6 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use mem;
 use ops::Range;
 use iter::FusedIterator;
@@ -454,7 +452,6 @@ static ASCII_UPPERCASE_MAP: [u8; 256] = [
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::*;
     use char::from_u32;
 

src/libstd/collections/hash/map.rs

@@ -2059,8 +2059,6 @@ fn assert_covariance() {
 
 #[cfg(test)]
 mod test_map {
-    use prelude::v1::*;
-
     use super::HashMap;
     use super::Entry::{Occupied, Vacant};
     use cell::RefCell;

src/libstd/collections/hash/set.rs

@@ -1067,8 +1067,6 @@ fn assert_covariance() {
 
 #[cfg(test)]
 mod test_set {
-    use prelude::v1::*;
-
     use super::HashSet;
 
     #[test]

src/libstd/env.rs

@@ -16,8 +16,6 @@
 
 #![stable(feature = "env", since = "1.0.0")]
 
-use prelude::v1::*;
-
 use error::Error;
 use ffi::{OsStr, OsString};
 use fmt;
@@ -950,7 +948,6 @@ mod arch {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::*;
 
     use iter::repeat;

src/libstd/error.rs

@@ -48,16 +48,15 @@
 // reconsider what crate these items belong in.
 
 use any::TypeId;
-use boxed::Box;
 use cell;
 use char;
 use fmt::{self, Debug, Display};
-use marker::{Send, Sync, Reflect};
+use marker::Reflect;
 use mem::transmute;
 use num;
 use raw::TraitObject;
 use str;
-use string::{self, String};
+use string;
 
 /// Base functionality for all errors in Rust.
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -454,7 +453,6 @@ impl Error + Send + Sync {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::Error;
     use fmt;
 

src/libstd/ffi/c_str.rs

@@ -9,25 +9,18 @@
 // except according to those terms.
 
 use ascii;
-use borrow::{Cow, ToOwned, Borrow};
-use boxed::Box;
-use convert::{Into, From};
-use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
+use borrow::{Cow, Borrow};
+use cmp::Ordering;
 use error::Error;
 use fmt::{self, Write};
 use io;
-use iter::Iterator;
 use libc;
 use mem;
 use memchr;
 use ops;
-use option::Option::{self, Some, None};
 use os::raw::c_char;
-use result::Result::{self, Ok, Err};
 use slice;
 use str::{self, Utf8Error};
-use string::String;
-use vec::Vec;
 
 /// A type representing an owned C-compatible string
 ///
@@ -700,7 +693,6 @@ impl AsRef<CStr> for CString {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use super::*;
     use os::raw::c_char;
     use borrow::Cow::{Borrowed, Owned};

src/libstd/ffi/os_str.rs

@@ -8,14 +8,12 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use borrow::{Borrow, Cow, ToOwned};
+use borrow::{Borrow, Cow};
 use fmt::{self, Debug};
 use mem;
-use string::String;
 use ops;
 use cmp;
 use hash::{Hash, Hasher};
-use vec::Vec;
 
 use sys::os_str::{Buf, Slice};
 use sys_common::{AsInner, IntoInner, FromInner};

src/libstd/fs.rs

@@ -23,7 +23,6 @@ use io::{self, SeekFrom, Seek, Read, Write};
 use path::{Path, PathBuf};
 use sys::fs as fs_imp;
 use sys_common::{AsInnerMut, FromInner, AsInner, IntoInner};
-use vec::Vec;
 use time::SystemTime;
 
 /// A reference to an open file on the filesystem.
@@ -1677,7 +1676,6 @@ impl AsInnerMut<fs_imp::DirBuilder> for DirBuilder {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
 
     use fs::{self, File, OpenOptions};

src/libstd/io/buffered.rs

@@ -10,7 +10,6 @@
 
 //! Buffering wrappers for I/O traits
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use marker::Reflect;
@@ -788,7 +787,6 @@ impl<W: Write> fmt::Debug for LineWriter<W> where W: fmt::Debug {
 
 #[cfg(test)]
 mod tests {
-    use prelude::v1::*;
     use io::prelude::*;
     use io::{self, BufReader, BufWriter, LineWriter, SeekFrom};
     use sync::atomic::{AtomicUsize, Ordering};

src/libstd/io/cursor.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::v1::*;
 use io::prelude::*;
 
 use cmp;
@@ -284,7 +283,6 @@ impl Write for Cursor<Box<[u8]>> {
 mod tests {
     use io::prelude::*;
     use io::{Cursor, SeekFrom};
-    use vec::Vec;
 
     #[test]
     fn test_vec_writer() {