[gnome-shell] workspace: Don't create useless childBox

[Marge Bot <marge-bot src gnome org>]

commit 5792b98f791c743b42a6fedb16295be77d4d6cb0
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Thu Feb 25 12:06:25 2021 +0100

    workspace: Don't create useless childBox
    
    Creating a ClutterActorBox here is superfluous, we actually create and
    assign a new box to this variable inside the loop.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1743>

 js/ui/workspace.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/js/ui/workspace.js b/js/ui/workspace.js
index e78630df49..8a273e865e 100644
--- a/js/ui/workspace.js
+++ b/js/ui/workspace.js
@@ -613,7 +613,6 @@ var WorkspaceLayout = GObject.registerClass({
 
         const workspaceBox = new Clutter.ActorBox();
         const layoutBox = new Clutter.ActorBox();
-        let childBox = new Clutter.ActorBox();
 
         const { ControlsState } = OverviewControls;
         const inSessionTransition =
@@ -657,7 +656,7 @@ var WorkspaceLayout = GObject.registerClass({
             layoutBox.set_origin(x, y);
             layoutBox.set_size(width, height);
 
-            childBox = workspaceBox.interpolate(layoutBox,
+            const childBox = workspaceBox.interpolate(layoutBox,
                 this._stateAdjustment.value);
 
             if (windowInfo.currentTransition) {