librustc_save_analysis: remove duplicate macro def

src/librustc_save_analysis/data.rs

@@ -20,17 +20,6 @@ use rustc::ty;
 use syntax::ast::{CrateNum, NodeId};
 use syntax::codemap::Span;
 
-#[macro_export]
-macro_rules! down_cast_data {
-    ($id:ident, $kind:ident, $sp:expr) => {
-        let $id = if let super::Data::$kind(data) = $id {
-            data
-        } else {
-            span_bug!($sp, "unexpected data kind: {:?}", $id);
-        }
-    };
-}
-
 pub struct CrateData {
     pub name: String,
     pub number: u32,

src/librustc_save_analysis/lib.rs

@@ -47,7 +47,6 @@ use syntax::visit::{self, Visitor};
 use syntax::print::pprust::ty_to_string;
 
 mod csv_dumper;
-#[macro_use]
 mod data;
 mod dump;
 mod dump_visitor;