Fix many warnings.

src/librustc/middle/borrowck/gather_loans/lifetime.rs

@@ -11,7 +11,6 @@
 //! This module implements the check that the lifetime of a borrow
 //! does not exceed the lifetime of the value being borrowed.
 
-use core::prelude::*;
 use middle::borrowck::*;
 use mc = middle::mem_categorization;
 use middle::ty;

src/librustc/middle/borrowck/gather_loans/mod.rs

@@ -16,8 +16,6 @@
 // their associated scopes.  In phase two, checking loans, we will then make
 // sure that all of these loans are honored.
 
-use core::prelude::*;
-
 use middle::borrowck::*;
 use mc = middle::mem_categorization;
 use middle::pat_util;

src/librustc/middle/borrowck/gather_loans/restrictions.rs

@@ -10,7 +10,6 @@
 
 //! Computes the restrictions that result from a borrow.
 
-use core::prelude::*;
 use middle::borrowck::*;
 use mc = middle::mem_categorization;
 use middle::ty;

src/librustc/middle/borrowck/mod.rs

@@ -10,8 +10,6 @@
 
 /*! See doc.rs for a thorough explanation of the borrow checker */
 
-use core::prelude::*;
-
 use mc = middle::mem_categorization;
 use middle::ty;
 use middle::typeck;

src/librustc/middle/dataflow.rs

@@ -16,7 +16,6 @@
  * GEN and KILL bits for each expression.
  */
 
-use core::prelude::*;
 use core::cast;
 use core::uint;
 use syntax::ast;

src/librustc/middle/trans/consts.rs

@@ -27,7 +27,6 @@ use util::ppaux::{Repr, ty_to_str};
 
 use core::libc::c_uint;
 use syntax::{ast, ast_util, ast_map};
-use util::ppaux::ty_to_str;
 
 pub fn const_lit(cx: @CrateContext, e: @ast::expr, lit: ast::lit)
     -> ValueRef {

src/librustc/middle/trans/expr.rs

@@ -145,7 +145,7 @@ use middle::trans::type_of;
 use middle::ty::struct_fields;
 use middle::ty::{AutoDerefRef, AutoAddEnv};
 use middle::ty::{AutoPtr, AutoBorrowVec, AutoBorrowVecRef, AutoBorrowFn,
-                 AutoDerefRef, AutoAddEnv, AutoUnsafe};
+                 AutoUnsafe};
 use middle::ty;
 use util::common::indenter;
 use util::ppaux::Repr;

src/librustc/middle/typeck/infer/combine.rs

@@ -62,7 +62,7 @@ use middle::typeck::infer::glb::Glb;
 use middle::typeck::infer::lub::Lub;
 use middle::typeck::infer::sub::Sub;
 use middle::typeck::infer::to_str::InferStr;
-use middle::typeck::infer::{cres, InferCtxt, ures, IntType, UintType};
+use middle::typeck::infer::{cres, InferCtxt, ures};
 use util::common::indent;
 
 use core::result::{iter_vec2, map_vec2};

src/librustc/middle/typeck/infer/lattice.rs

@@ -41,8 +41,6 @@ use middle::typeck::infer::glb::Glb;
 use middle::typeck::infer::lub::Lub;
 use middle::typeck::infer::unify::*;
 use middle::typeck::infer::sub::Sub;
-use middle::typeck::infer::lub::Lub;
-use middle::typeck::infer::glb::Glb;
 use middle::typeck::infer::to_str::InferStr;
 use util::common::indenter;