diff --git a/packages/theme-chalk/src/mixins/_col.scss b/packages/theme-chalk/src/mixins/_col.scss
index a5a2c25282..9e2e066530 100644
--- a/packages/theme-chalk/src/mixins/_col.scss
+++ b/packages/theme-chalk/src/mixins/_col.scss
@@ -1,5 +1,3 @@
-@use "sass:math";
-
 @import '../common/var.scss';
 @import './mixins.scss';