add bool var toggle function

Signed-off-by: Ava Hahn <ava@aidanis.online>

src/stl/control.rs

@@ -116,9 +116,6 @@ pub fn let_callback(ast: &Seg, syms: &mut SymTable) -> Result<Ctr, String> {
                         return false
                     }
 
-                    let temp = var_val_res.clone().unwrap();
-                    println!("dbg: {}", temp);
-
                     localsyms.insert(name.clone(), Symbol {
                         name: name.clone(),
                         args: Args::None,