Cleanup after enabling all slimming paint for all layout tests

LayoutTests/platform/win/virtual/slimmingpaint/compositing/overflow/scrolling-without-painting-expected.txt

Index: LayoutTests/platform/win/virtual/slimmingpaint/compositing/overflow/scrolling-without-painting-expected.txt
diff --git a/LayoutTests/platform/win/virtual/slimmingpaint/compositing/overflow/scrolling-without-painting-expected.txt b/LayoutTests/platform/win/virtual/slimmingpaint/compositing/overflow/scrolling-without-painting-expected.txt
deleted file mode 100644
index b954257c0a98134b5bb304b9b33d3f97f1af3c03..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/win/virtual/slimmingpaint/compositing/overflow/scrolling-without-painting-expected.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "bounds": [800, 600],
-  "children": [
-    {
-      "bounds": [800, 600],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "children": [
-        {
-          "position": [8, 8],
-          "bounds": [202, 202],
-          "drawsContent": true,
-          "children": [
-            {
-              "position": [1, 1],
-              "bounds": [185, 185],
-              "children": [
-                {
-                  "bounds": [185, 1025],
-                  "drawsContent": true,
-                  "children": [
-                    {
-
-                    }
-                  ]
-                }
-              ]
-            },
-            {
-              "children": [
-                {
-                  "position": [1, 186],
-                  "bounds": [185, 15],
-                  "drawsContent": true
-                },
-                {
-                  "position": [186, 1],
-                  "bounds": [15, 185],
-                  "drawsContent": true,
-                  "repaintRects": [
-                    [0, 0, 15, 185]
-                  ],
-                  "paintInvalidationClients": [
-                    "##ALL##"
-                  ]
-                },
-                {
-                  "position": [186, 186],
-                  "bounds": [15, 15],
-                  "drawsContent": true
-                }
-              ]
-            }
-          ]
-        }
-      ]
-    }
-  ]
-}
-