Migrate svg layout tests to use slimming paint by default

LayoutTests/virtual/slimmingpaint/svg/repaint/modify-transferred-listitem-different-attr-expected.txt

Index: LayoutTests/virtual/slimmingpaint/svg/repaint/modify-transferred-listitem-different-attr-expected.txt
diff --git a/LayoutTests/virtual/slimmingpaint/svg/repaint/modify-transferred-listitem-different-attr-expected.txt b/LayoutTests/virtual/slimmingpaint/svg/repaint/modify-transferred-listitem-different-attr-expected.txt
deleted file mode 100644
index 7b21c2f8e3ff3df27edf5e9d8ce7afd9a7a19607..0000000000000000000000000000000000000000
--- a/LayoutTests/virtual/slimmingpaint/svg/repaint/modify-transferred-listitem-different-attr-expected.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-{
-  "bounds": [800, 600],
-  "children": [
-    {
-      "bounds": [800, 600],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "repaintRects": [
-        [103, 8, 5, 23],
-        [58, 61, 50, 10],
-        [58, 45, 50, 26],
-        [58, 45, 50, 16],
-        [23, 61, 85, 10],
-        [23, 8, 85, 23],
-        [23, 8, 80, 23]
-      ],
-      "paintInvalidationClients": [
-        "RootInlineBox",
-        "InlineTextBox 'A'",
-        "InlineTextBox ' B C'",
-        "RootInlineBox",
-        "InlineTextBox 'X'",
-        "InlineTextBox ' Y Z'",
-        "LayoutSVGRoot svg",
-        "LayoutSVGText text id='target'",
-        "LayoutSVGInlineText #text",
-        "InlineTextBox 'A'",
-        "InlineTextBox ' B C'",
-        "LayoutSVGText text id='source'",
-        "LayoutSVGInlineText #text",
-        "InlineTextBox 'X Y Z'"
-      ]
-    }
-  ]
-}
-