fix(radio): 移除group中无用的box-shadow: none（因为radio-button并没有未定义box-shadow）

Author: Zz-ZzzZ

packages/devui-vue/devui/radio/src/radio-button.scss

@@ -79,7 +79,6 @@ $button-padding-map: (
  border-top-left-radius: $devui-border-radius;
  border-bottom-left-radius: $devui-border-radius;
  border-left: 1px solid $devui-disabled-line;
- box-shadow: none;
  }
 
  &:last-child {
@@ -98,7 +97,6 @@ $button-padding-map: (
  border-top-left-radius: $devui-border-radius;
  border-top-right-radius: $devui-border-radius;
  border-top: 1px solid $devui-disabled-line;
- box-shadow: none;
  }
 
  &:last-child {