Merge pull request #974 from sanxiyn/unused-trait-import

Remove unused trait imports

Author: nrc

src/checkstyle.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 use rustfmt_diff::{Mismatch, DiffLine};
-use std::io::{self, Write, Read};
+use std::io::{self, Write};
 use config::WriteMode;
 
 

src/expr.rs

@@ -33,7 +33,6 @@ use macros::rewrite_macro;
 use syntax::{ast, ptr};
 use syntax::codemap::{CodeMap, Span, BytePos, mk_sp};
 use syntax::parse::classify;
-use syntax::visit::Visitor;
 
 impl Rewrite for ast::Expr {
     fn rewrite(&self, context: &RewriteContext, width: usize, offset: Indent) -> Option<String> {