diff --git a/day_07/src/equation.rs b/day_07/src/equation.rs
index 510b709..e2321b4 100644
--- a/day_07/src/equation.rs
+++ b/day_07/src/equation.rs
@@ -1,7 +1,5 @@
 mod operator_set;
 
-use std::collections::HashSet;
-
 use operator_set::{Op, create_permutations};
 
 #[derive(Debug)]