feat: change style scss to less

Author: yaoleyaotouoO

packages/components/src/__builtins__/styles/common.less

@@ -1,14 +1,2 @@
-$formily-prefix: 'formily-vant';
-$namespace: 'vant';
-
-@mixin active {
-  border-color: $--color-primary;
-  outline: 0;
-  border-right-width: $--border-width-base !important;
-}
-
-@mixin hover {
-  border-color: $--border-color-hover;
-  outline: 0;
-  border-right-width: $--border-width-base !important;
-}
+@formily-prefix: 'formily-vant';
+@namespace: 'vant';