Cleanup after enabling all slimming paint for all layout tests

LayoutTests/platform/mac/virtual/slimmingpaint/compositing/geometry/video-fixed-scrolling-expected.txt

Index: LayoutTests/platform/mac/virtual/slimmingpaint/compositing/geometry/video-fixed-scrolling-expected.txt
diff --git a/LayoutTests/platform/mac/virtual/slimmingpaint/compositing/geometry/video-fixed-scrolling-expected.txt b/LayoutTests/platform/mac/virtual/slimmingpaint/compositing/geometry/video-fixed-scrolling-expected.txt
deleted file mode 100644
index a5b6f88fb98331f1bd62d83dc6af3c9f0a0a9398..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/mac/virtual/slimmingpaint/compositing/geometry/video-fixed-scrolling-expected.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-layer at (0,0) size 800x600 clip at (0,0) size 785x600 scrollY 50.00 scrollHeight 1016
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 785x1016 backgroundClip at (0,0) size 785x600 clip at (0,0) size 785x600 outlineClip at (0,0) size 785x600
-  LayoutBlockFlow {HTML} at (0,0) size 785x1016
-    LayoutBlockFlow {BODY} at (8,8) size 769x1000
-      LayoutBlockFlow (anonymous) at (0,0) size 769x384
-        LayoutText {#text} at (0,0) size 0x0
-      LayoutBlockFlow {P} at (0,400) size 769x18
-        LayoutText {#text} at (0,0) size 453x18
-          text run at (0,0) width 453: "The blue bar should be in front of the video, and at the top of the page."
-layer at (8,88) size 400x300
-  LayoutVideo {VIDEO} at (0,80) size 400x300
-layer at (8,88) size 400x300
-  LayoutFlexibleBox (relative positioned) {DIV} at (0,0) size 400x300
-    LayoutBlockFlow {DIV} at (0,265) size 400x35
-layer at (8,88) size 400x265
-  LayoutFlexibleBox (relative positioned) {DIV} at (0,0) size 400x265
-layer at (0,50) size 500x60
-  LayoutBlockFlow (positioned) {DIV} at (0,0) size 500x60 [bgcolor=#0000FFCC]
-scrolled to 0,50