Update parser.rs

src/frontend/parser.rs

@@ -1,11 +1,9 @@
-use std::collections::hash_map::Values;
-
 use crate::{
     common::{
         ast::{AstNode, Expr},
         base_value::{BaseValue, LoxFunction},
-        lox_result::{parse_error, runtime_error, LoxError, LoxResult},
+        lox_result::{parse_error, runtime_error, LoxResult},
-        types::{FunctionType, Type},
+        types::Type,
     },
     frontend::{
         source_registry::SourceSlice,