Remove stale files from lib/html/src.

lib/html/src/SVGElementInstanceWrappingImplementation.dart

Index: lib/html/src/SVGElementInstanceWrappingImplementation.dart
diff --git a/lib/html/src/SVGElementInstanceWrappingImplementation.dart b/lib/html/src/SVGElementInstanceWrappingImplementation.dart
deleted file mode 100644
index 8ab1c34c1ebe9cf9bd81a771175110bd391da482..0000000000000000000000000000000000000000
--- a/lib/html/src/SVGElementInstanceWrappingImplementation.dart
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// WARNING: Do not edit - generated code.
-
-class SVGElementInstanceWrappingImplementation extends EventTargetWrappingImplementation implements SVGElementInstance {
-  SVGElementInstanceWrappingImplementation._wrap(ptr) : super._wrap(ptr) {}
-
-  SVGElementInstanceList get childNodes() { return LevelDom.wrapSVGElementInstanceList(_ptr.childNodes); }
-
-  SVGElement get correspondingElement() { return LevelDom.wrapSVGElement(_ptr.correspondingElement); }
-
-  SVGUseElement get correspondingUseElement() { return LevelDom.wrapSVGUseElement(_ptr.correspondingUseElement); }
-
-  SVGElementInstance get firstChild() { return LevelDom.wrapSVGElementInstance(_ptr.firstChild); }
-
-  SVGElementInstance get lastChild() { return LevelDom.wrapSVGElementInstance(_ptr.lastChild); }
-
-  SVGElementInstance get nextSibling() { return LevelDom.wrapSVGElementInstance(_ptr.nextSibling); }
-
-  SVGElementInstance get parentNode() { return LevelDom.wrapSVGElementInstance(_ptr.parentNode); }
-
-  SVGElementInstance get previousSibling() { return LevelDom.wrapSVGElementInstance(_ptr.previousSibling); }
-
-}