GC now-unused imports

Author: jld

src/librustc/middle/trans/_match.rs

@@ -145,7 +145,6 @@
 use core::prelude::*;
 
 use back::abi;
-use lib;
 use lib::llvm::{llvm, ValueRef, BasicBlockRef};
 use middle::const_eval;
 use middle::borrowck::root_map_key;
@@ -170,9 +169,7 @@ use util::common::indenter;
 
 use core::dvec::DVec;
 use core::dvec;
-use core::libc::c_ulonglong;
 use std::oldmap::HashMap;
-use syntax::ast::def_id;
 use syntax::ast;
 use syntax::ast::ident;
 use syntax::ast_util::path_to_ident;

src/librustc/middle/trans/type_of.rs

@@ -15,12 +15,10 @@ use middle::trans::adt;
 use middle::trans::base;
 use middle::trans::common::*;
 use middle::trans::common;
-use middle::trans::machine;
 use middle::ty;
 use util::ppaux;
 
 use core::option::None;
-use core::vec;
 use syntax::ast;
 
 pub fn type_of_explicit_arg(ccx: @CrateContext, arg: ty::arg) -> TypeRef {