fix(list): remove uneeded border radius from items in inset list

core/src/components/list/list.md.scss

@@ -23,25 +23,9 @@
   @include border-radius($list-inset-md-border-radius);
 }
 
-/**
- * These selectors ensure the first item in the list
- * has the correct radius.
- * We need to consider the following scenarios:
- 1. The first item in a list as long as it is not the only item.
- 2. The item in the first item-sliding in a list.
- * Note that we do not select "ion-item-sliding ion-item:first-of-type"
- * because that will cause the borders to disappear on
- * items in an item-sliding when the item is the first
- * element in the item-sliding container.
- */
-.list-md.list-inset ion-item:not(:only-of-type):first-of-type,
-.list-md.list-inset ion-item-sliding:first-of-type ion-item {
-  --border-radius: #{$list-inset-md-border-radius $list-inset-md-border-radius 0 0};
-}
-
 /**
  * These selectors ensure the last item in the list
- * has the correct radius and border.
+ * has the correct border.
  * We need to consider the following scenarios:
  1. The last item in a list as long as it is not the only item.
  2. The item in the last item-sliding in a list.
@@ -52,21 +36,17 @@
  */
 .list-md.list-inset ion-item:not(:only-of-type):last-of-type,
 .list-md.list-inset ion-item-sliding:last-of-type ion-item {
-  --border-radius: #{0 0 $list-inset-md-border-radius $list-inset-md-border-radius};
   --border-width: 0;
   --inner-border-width: 0;
 }
 
 /**
- * The only item in a list should have a border radius
- * on all corners.
  * We target :only-child instead of :only-of-type
  * otherwise borders will disappear on items inside of
  * ion-item-sliding because the item will be the only
  * one of its type inside of the ion-item-sliding group.
  */
 .list-md.list-inset ion-item:only-child {
-  --border-radius: #{$list-inset-md-border-radius};
   --border-width: 0;
   --inner-border-width: 0;
 }