update

src/less/widget/arrangement/arrangement.block.less

@@ -1,4 +0,0 @@
-@import "../../index";
-
-.bi-arrangement-block {
-}

src/less/widget/arrangement/arrangement.droppable.less

@@ -1,5 +0,0 @@
-@import "../../index";
-
-.bi-arrangement-droppable{
-  z-index: @zIndex-layer;
-}

src/less/widget/arrangement/arrangement.less

@@ -1,28 +0,0 @@
-@import "../../index";
-
-.bi-arrangement {
-  & .arrangement-helper {
-    background: @color-bi-background-highlight;
-    z-index: @zIndex-tip;
-  }
-  & .arrangement-block {
-    z-index: @zIndex-tip;
-  }
-  & .arrangement-drop-container {
-    z-index: @zIndex-tip;
-    & .arrangement-drop-region {
-      overflow: hidden;
-    }
-    & .drop-devider{
-      z-index: @zIndex-tip + 1;
-      background: @color-bi-background-highlight;
-    }
-    & .top-left, & .top-right, & .bottom-left, & .bottom-right,
-    & .top-left-second, & .top-right-second, & .bottom-left-second, & .bottom-right-second,
-    & .top-center, & .bottom-center, & .left-center, & .right-center,
-    & .top-center-second, & .bottom-center-second, & .left-center-second, & .right-center-second {
-      z-index: @zIndex-tip + 1;
-      background: @color-bi-background-highlight;
-    }
-  }
-}