Remove SVGElementInstance

LayoutTests/svg/custom/use-instanceRoot-modifications.svg

Index: LayoutTests/svg/custom/use-instanceRoot-modifications.svg
diff --git a/LayoutTests/svg/custom/use-instanceRoot-modifications.svg b/LayoutTests/svg/custom/use-instanceRoot-modifications.svg
deleted file mode 100644
index 137328b44e3e39839ea4e964614a8cba6f108031..0000000000000000000000000000000000000000
--- a/LayoutTests/svg/custom/use-instanceRoot-modifications.svg
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg viewBox="0 0 400 300" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<defs>
-    <g id="g">
-        <rect id="rect" stroke-width="5px" fill="red" stroke="navy" width="60" height="10"/>
-        <circle id="circle" opacity="0.5" fill="green" cx="30" cy="5" r="10"/>
-    </g>
-</defs>
-
-<use x="25" y="25" xlink:href="#g"/>
-<use x="125" y="25" xlink:href="#g"/>
-
-<text id="text" x="70" y="70">Test failed.</text>
-
-<script>
-function runInstanceRootTest() {
-    var useElement = document.getElementsByTagName("use")[1];
-    if (useElement != useElement.instanceRoot.correspondingUseElement)
-        return;
-
-    var element = useElement.instanceRoot.correspondingElement;
-    if (element != document.getElementById("g"))
-        return;
-
-    // element.firstChild is a #text node! the next sibling gives the rect
-    var rect = element.firstChild.nextSibling;
-    if (rect != document.getElementById("rect"))
-        return;
-
-    // rect.nextSibling is a #text node! the next sibling gives the circle
-    var circle = rect.nextSibling.nextSibling;
-    if (circle != document.getElementById("circle"))
-        return;
-
-    rect.setAttribute("fill", "green");
-    circle.setAttribute("opacity", "0.8");
-
-    document.getElementById("text").firstChild.nodeValue = "Test passed.";
-}
-runInstanceRootTest();
-</script>
-</svg>