Remove duplicated invalidation

LayoutTests/compositing/squashing/squashed-repaints-expected.txt

Index: LayoutTests/compositing/squashing/squashed-repaints-expected.txt
diff --git a/LayoutTests/compositing/squashing/squashed-repaints-expected.txt b/LayoutTests/compositing/squashing/squashed-repaints-expected.txt
index 0bab854b78a1c3ff28fa7ab27e5be35fcadd41ed..ddaecabb3e444b870044ac844cbc1a0a78270349 100644
--- a/LayoutTests/compositing/squashing/squashed-repaints-expected.txt
+++ b/LayoutTests/compositing/squashing/squashed-repaints-expected.txt
@@ -54,7 +54,6 @@ CASE 2, overlap1 changes color:
               (repaint rects
                 (rect 0.00 0.00 100.00 100.00)
                 (rect 0.00 0.00 100.00 100.00)
-                (rect 0.00 0.00 100.00 100.00)
               )
             )
           )
@@ -88,8 +87,6 @@ CASE 3, overlap1 and overlap2 change color:
               (repaint rects
                 (rect 80.00 80.00 100.00 100.00)
                 (rect 80.00 80.00 100.00 100.00)
-                (rect 80.00 80.00 100.00 100.00)
-                (rect 0.00 0.00 100.00 100.00)
                 (rect 0.00 0.00 100.00 100.00)
                 (rect 0.00 0.00 100.00 100.00)
               )
@@ -125,8 +122,6 @@ CASE 4, overlap2 and overlap3 change color:
               (repaint rects
                 (rect 160.00 160.00 100.00 100.00)
                 (rect 160.00 160.00 100.00 100.00)
-                (rect 160.00 160.00 100.00 100.00)
-                (rect 80.00 80.00 100.00 100.00)
                 (rect 80.00 80.00 100.00 100.00)
                 (rect 80.00 80.00 100.00 100.00)
               )
@@ -162,8 +157,6 @@ CASE 5, overlap3 and overlap1 change color:
               (repaint rects
                 (rect 160.00 160.00 100.00 100.00)
                 (rect 160.00 160.00 100.00 100.00)
-                (rect 160.00 160.00 100.00 100.00)
-                (rect 0.00 0.00 100.00 100.00)
                 (rect 0.00 0.00 100.00 100.00)
                 (rect 0.00 0.00 100.00 100.00)
               )