Remove generated directories with 100s of files.

client/html/generated/html/dartium/ValidityState.dart

Index: client/html/generated/html/dartium/ValidityState.dart
diff --git a/client/html/generated/html/dartium/ValidityState.dart b/client/html/generated/html/dartium/ValidityState.dart
deleted file mode 100644
index 5161df68cc978e47692c8ac79ebe535edd263b8f..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/ValidityState.dart
+++ /dev/null
@@ -1,22 +0,0 @@
-
-class _ValidityStateImpl extends _DOMTypeBase implements ValidityState {
-  _ValidityStateImpl._wrap(ptr) : super._wrap(ptr);
-
-  bool get customError() => _wrap(_ptr.customError);
-
-  bool get patternMismatch() => _wrap(_ptr.patternMismatch);
-
-  bool get rangeOverflow() => _wrap(_ptr.rangeOverflow);
-
-  bool get rangeUnderflow() => _wrap(_ptr.rangeUnderflow);
-
-  bool get stepMismatch() => _wrap(_ptr.stepMismatch);
-
-  bool get tooLong() => _wrap(_ptr.tooLong);
-
-  bool get typeMismatch() => _wrap(_ptr.typeMismatch);
-
-  bool get valid() => _wrap(_ptr.valid);
-
-  bool get valueMissing() => _wrap(_ptr.valueMissing);
-}