Fix rebase fallout

Author: est31

src/librustc_metadata/decoder.rs

@@ -43,7 +43,6 @@ use syntax::attr;
 use syntax::ast::{self, NodeId};
 use syntax::codemap;
 use syntax_pos::{self, Span, BytePos, Pos, DUMMY_SP};
-use syntax_pos::{self, Span, BytePos, Pos};
 use rustc_i128::{u128, i128};
 
 pub struct DecodeContext<'a, 'tcx: 'a> {