incr.comp.: Fix merge fallout.

Author: michaelwoerister

src/librustc/ty/maps/on_disk_cache.rs

@@ -15,7 +15,6 @@ use hir::def_id::{CrateNum, DefIndex, DefId, LocalDefId,
                   RESERVED_FOR_INCR_COMP_CACHE, LOCAL_CRATE};
 use hir::map::definitions::DefPathHash;
 use ich::CachingCodemapView;
-use middle::cstore::CrateStore;
 use mir;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::indexed_vec::{IndexVec, Idx};