diff --git a/src/protocol/ast_printer.rs b/src/protocol/ast_printer.rs
index 84ca2c509b5c34e2a88e560859b7b9e403161cd9..2bd329753b8eb5b381484b4f8d1a6948f0b739d4 100644
--- a/src/protocol/ast_printer.rs
+++ b/src/protocol/ast_printer.rs
@@ -2,7 +2,6 @@ use std::fmt::{Debug, Display, Write};
 use std::io::Write as IOWrite;
 
 use super::ast::*;
-use std::borrow::Borrow;
 
 const INDENT: usize = 2;