Remove generated directories with 100s of files.

client/html/generated/html/frog/SVGSymbolElement.dart

Index: client/html/generated/html/frog/SVGSymbolElement.dart
diff --git a/client/html/generated/html/frog/SVGSymbolElement.dart b/client/html/generated/html/frog/SVGSymbolElement.dart
deleted file mode 100644
index 2ac55bbd45e8bcbb9fdc7d4ca35da01ee3d1eea7..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/SVGSymbolElement.dart
+++ /dev/null
@@ -1,28 +0,0 @@
-
-class _SVGSymbolElementImpl extends _SVGElementImpl implements SVGSymbolElement native "*SVGSymbolElement" {
-
-  // From SVGLangSpace
-
-  String xmllang;
-
-  String xmlspace;
-
-  // From SVGExternalResourcesRequired
-
-  final _SVGAnimatedBooleanImpl externalResourcesRequired;
-
-  // From SVGStylable
-
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
-
-  // Use implementation from Element.
-  // final _CSSStyleDeclarationImpl style;
-
-  _CSSValueImpl getPresentationAttribute(String name) native;
-
-  // From SVGFitToViewBox
-
-  final _SVGAnimatedPreserveAspectRatioImpl preserveAspectRatio;
-
-  final _SVGAnimatedRectImpl viewBox;
-}