Update modal.scss

Author: ZKunZhang

packages/devui-vue/devui/modal/src/modal.scss

@@ -48,11 +48,6 @@
       vertical-align: middle;
       font-size: 18px;
     }
-    & i {
-      position: absolute;
-      right: 0;
-      top: 0;
-    }
   }
 }
 
@@ -117,4 +112,4 @@
     opacity: 0.2;
     top: calc(50% - 24px);
   }
-}
+}