Remove old NeedsRebaseline entries

LayoutTests/platform/mac/svg/custom/relative-sized-use-on-symbol-expected.txt

-CONSOLE WARNING: SVG's SMIL animations (<animate>, <set>, etc.) are deprecated and will be removed. Please use CSS animations or Web animations instead.
-(GraphicsLayer
-  (bounds 800.00 600.00)
-  (children 1
-    (GraphicsLayer
-      (bounds 800.00 600.00)
-      (contentsOpaque 1)
-      (drawsContent 1)
-      (repaint rects
-        (rect 45.00 85.00 328.00 328.00)
-        (rect 45.00 85.00 328.00 328.00)
-        (rect 45.00 85.00 328.00 328.00)
-        (rect 45.00 85.00 328.00 328.00)
-        (rect 18.00 209.00 82.00 83.00)
-        (rect 18.00 209.00 82.00 83.00)
-        (rect 18.00 209.00 82.00 83.00)
-        (rect 18.00 209.00 82.00 83.00)
-        (rect 15.00 57.00 137.00 137.00)
-        (rect 15.00 57.00 94.00 137.00)
-        (rect 8.00 50.00 402.00 405.00)
-        (rect 8.00 50.00 102.00 405.00)
-      )
-    )
-  )
-)
+{
+  "bounds": [800, 600],
+  "children": [
+    {
+      "bounds": [800, 600],
+      "contentsOpaque": true,
+      "drawsContent": true,
+      "repaintRects": [
+        [45, 85, 328, 328],
+        [45, 85, 328, 328],
+        [45, 85, 328, 328],
+        [45, 85, 328, 328],
+        [18, 209, 82, 83],
+        [18, 209, 82, 83],
+        [18, 209, 82, 83],
+        [18, 209, 82, 83],
+        [8, 50, 402, 405],
+        [8, 50, 102, 405]
+      ],
+      "paintInvalidationClients": [
+        "RootInlineBox",
+        "InlineBox",
+        "LayoutBlockFlow div id='contentBox'",
+        "LayoutSVGRoot svg",
+        "LayoutSVGContainer use",
+        "LayoutSVGViewportContainer svg id='gamesBorder'",
+        "LayoutSVGPath path"
+      ]
+    }
+  ]
+}