Cleanup after enabling all slimming paint for all layout tests

LayoutTests/platform/linux/virtual/slimmingpaint/compositing/squashing/iframe-inside-squashed-layer-expected.txt

Index: LayoutTests/platform/linux/virtual/slimmingpaint/compositing/squashing/iframe-inside-squashed-layer-expected.txt
diff --git a/LayoutTests/platform/linux/virtual/slimmingpaint/compositing/squashing/iframe-inside-squashed-layer-expected.txt b/LayoutTests/platform/linux/virtual/slimmingpaint/compositing/squashing/iframe-inside-squashed-layer-expected.txt
deleted file mode 100644
index 51ad1634aad3bae06311e997dbfe25236c7ffc7b..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/linux/virtual/slimmingpaint/compositing/squashing/iframe-inside-squashed-layer-expected.txt
+++ /dev/null
@@ -1,66 +0,0 @@
-{
-  "bounds": [785, 1016],
-  "children": [
-    {
-      "bounds": [785, 1016],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "children": [
-        {
-          "shouldFlattenTransform": false,
-          "children": [
-            {
-              "position": [8, 8],
-              "bounds": [200, 1000],
-              "contentsOpaque": true,
-              "drawsContent": true,
-              "backgroundColor": "#D3D3D3"
-            },
-            {
-              "position": [8, 0],
-              "bounds": [300, 654],
-              "drawsContent": true,
-              "repaintRects": [
-                [285, 515, 15, 135],
-                [285, 500, 15, 150],
-                [285, 500, 15, 150],
-                [285, 500, 15, 150],
-                [8, 508, 284, 20],
-                [8, 508, 269, 142],
-                [0, 500, 300, 150],
-                [0, 500, 300, 36],
-                [0, 500, 285, 150],
-                [0, 500, 285, 150],
-                [0, 500, 285, 150],
-                [0, 500, 15, 15],
-                [0, 500, 15, 15]
-              ],
-              "paintInvalidationClients": [
-                "RootInlineBox",
-                "InlineTextBox 'test1'",
-                "VerticalScrollbar",
-                "LayoutIFrame IFRAME id='subframe'",
-                "LayoutIFrame IFRAME id='subframe'",
-                "RootInlineBox",
-                "InlineTextBox 'test1'",
-                "VerticalScrollbar",
-                "LayoutIFrame IFRAME id='subframe'",
-                "VerticalScrollbar",
-                "LayoutIFrame IFRAME id='subframe'",
-                "VerticalScrollbar",
-                "LayoutIFrame IFRAME id='subframe'",
-                "VerticalScrollbar",
-                "LayoutIFrame IFRAME id='subframe'",
-                "LayoutView #document",
-                "LayoutView #document",
-                "LayoutBlockFlow HTML",
-                "LayoutBlockFlow BODY"
-              ]
-            }
-          ]
-        }
-      ]
-    }
-  ]
-}
-