Removed various bits of unused code

src/interpreter/classes.rs

@@ -2,11 +2,10 @@ use std::{cell::RefCell, collections::HashMap, fmt::Display, rc::Rc};
 
 use crate::{
     errors::{ErrorKind, SloxError, SloxResult},
-    interpreter::EnvironmentRef,
-    tokens::{Token, TokenType},
+    tokens::Token,
 };
 
-use super::{functions::Function, Callable, Environment, InterpreterState, Value};
+use super::{functions::Function, Callable, InterpreterState, Value};
 
 /// A Lox class.
 #[derive(Debug, Clone)]
@@ -25,13 +24,6 @@ pub struct Instance {
     fields: HashMap<String, Value>,
 }
 
-/// A method bound to an instance.
-#[derive(Debug, Clone)]
-pub struct BoundMethod {
-    instance: Value,
-    method: String,
-}
-
 /* -------------------- *
  * Class implementation *
  * -------------------- */