fixes

src/lib/node/call.rs

@@ -2,7 +2,7 @@ use std::rc::Rc;
 
 use crate::{environment::Environment, node::function::FunctionType};
 
-use super::{Node, NodeEnum, Precedence, symbol::Symbol};
+use super::{Node, NodeEnum, Precedence};
 
 #[derive(Debug, Clone, PartialEq, PartialOrd)]
 pub struct Call {

src/lib/node/symbol.rs

@@ -1,10 +1,6 @@
-use std::{
+use std::rc::Rc;
-    collections::HashMap,
-    rc::Rc,
-    sync::{LazyLock, Mutex},
-};
 
-use super::{Environment, Node, NodeEnum, Precedence, node_ref::NodeRef};
+use super::{Environment, Node, NodeEnum, Precedence};
 use crate::environment::EnvironmentInternalSymbolKey;
 
 #[derive(Debug, Clone, PartialEq, PartialOrd)]

src/lib/parser/mod.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashMap, iter::Peekable, rc::Rc, slice::Iter, str::Chars, vec::IntoIter};
+use std::{iter::Peekable, rc::Rc, slice::Iter, str::Chars, vec::IntoIter};
 
 use crate::{
     environment::Environment,