fix(select-modal): revert md styling

Author: thetaPC

core/src/components/select-modal/select-modal.md.scss

@@ -10,6 +10,10 @@ ion-list ion-radio::part(label) {
   @include margin(0);
 }
 
+ion-item {
+  --inner-border-width: 0;
+}
+
 .item-radio-checked {
   --background: #{ion-color(primary, base, 0.08)};
   --background-focused: #{ion-color(primary, base)};