librustc: Remove unused CrateContext::type_short_names

Author: pcwalton

src/librustc/middle/trans/context.rs

@@ -97,7 +97,6 @@ pub struct CrateContext {
      adt_reprs: RefCell<HashMap<ty::t, @adt::Repr>>,
      symbol_hasher: Sha256,
      type_hashcodes: RefCell<HashMap<ty::t, @str>>,
-     type_short_names: HashMap<ty::t, ~str>,
      all_llvm_symbols: HashSet<@str>,
      tcx: ty::ctxt,
      maps: astencode::Maps,
@@ -208,7 +207,6 @@ impl CrateContext {
                   adt_reprs: RefCell::new(HashMap::new()),
                   symbol_hasher: symbol_hasher,
                   type_hashcodes: RefCell::new(HashMap::new()),
-                  type_short_names: HashMap::new(),
                   all_llvm_symbols: HashSet::new(),
                   tcx: tcx,
                   maps: maps,