Remove generated directories with 100s of files.

client/html/generated/html/frog/SVGGradientElement.dart

Index: client/html/generated/html/frog/SVGGradientElement.dart
diff --git a/client/html/generated/html/frog/SVGGradientElement.dart b/client/html/generated/html/frog/SVGGradientElement.dart
deleted file mode 100644
index 11330e6a38bdc8690b0e6ee6ac3cebc3a96f9d37..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/SVGGradientElement.dart
+++ /dev/null
@@ -1,34 +0,0 @@
-
-class _SVGGradientElementImpl extends _SVGElementImpl implements SVGGradientElement native "*SVGGradientElement" {
-
-  static final int SVG_SPREADMETHOD_PAD = 1;
-
-  static final int SVG_SPREADMETHOD_REFLECT = 2;
-
-  static final int SVG_SPREADMETHOD_REPEAT = 3;
-
-  static final int SVG_SPREADMETHOD_UNKNOWN = 0;
-
-  final _SVGAnimatedTransformListImpl gradientTransform;
-
-  final _SVGAnimatedEnumerationImpl gradientUnits;
-
-  final _SVGAnimatedEnumerationImpl spreadMethod;
-
-  // From SVGURIReference
-
-  final _SVGAnimatedStringImpl href;
-
-  // 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;
-}