kill some unused imports

Author: nikomatsakis

src/librustc/traits/project.rs

@@ -26,7 +26,6 @@ use super::util;
 use hir::def_id::DefId;
 use infer::{InferOk, TypeOrigin};
 use rustc_data_structures::snapshot_map::{Snapshot, SnapshotMap};
-use std::env;
 use syntax::parse::token;
 use syntax::ast;
 use ty::subst::Subst;

src/librustc_typeck/check/compare_method.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 use middle::free_region::FreeRegionMap;
-use rustc::infer::{self, InferOk, InferResult, TypeOrigin};
+use rustc::infer::{self, InferOk, TypeOrigin};
 use rustc::ty;
 use rustc::traits::{self, ProjectionMode};
 use rustc::ty::subst::{self, Subst, Substs, VecPerParamSpace};