unneeded import

src/syntax.rs

@@ -47,7 +47,7 @@ pub use crate::syntax::location::Location;
 pub use crate::syntax::parser::{ProgramParser, TopLevelParser};
 pub use crate::syntax::tokens::{LexerError, Token};
 #[cfg(test)]
-use ::pretty::{Arena, Pretty};
+use ::pretty::Arena;
 use lalrpop_util::ParseError;
 #[cfg(test)]
 use proptest::{arbitrary::Arbitrary, prop_assert, prop_assert_eq};