remove ItemMap

crates/ra_hir/src/lib.rs

@@ -54,7 +54,7 @@ pub use self::{
     name::Name,
     ids::{HirFileId, MacroCallId, MacroCallLoc, HirInterner},
     macros::{MacroDef, MacroInput, MacroExpansion},
-    nameres::{ItemMap, PerNs, Namespace},
+    nameres::{PerNs, Namespace},
     ty::{Ty, Substs, display::HirDisplay},
     impl_block::{ImplBlock, ImplItem},
     docs::{Docs, Documentation},