Remove generated directories with 100s of files.

client/html/generated/html/frog/TextAreaElement.dart

Index: client/html/generated/html/frog/TextAreaElement.dart
diff --git a/client/html/generated/html/frog/TextAreaElement.dart b/client/html/generated/html/frog/TextAreaElement.dart
deleted file mode 100644
index c4a7785d61d229f58bad4feade755c7fce8fd2b1..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/TextAreaElement.dart
+++ /dev/null
@@ -1,55 +0,0 @@
-
-class _TextAreaElementImpl extends _ElementImpl implements TextAreaElement native "*HTMLTextAreaElement" {
-
-  bool autofocus;
-
-  int cols;
-
-  String defaultValue;
-
-  bool disabled;
-
-  final _FormElementImpl form;
-
-  final _NodeListImpl labels;
-
-  int maxLength;
-
-  String name;
-
-  String placeholder;
-
-  bool readOnly;
-
-  bool required;
-
-  int rows;
-
-  String selectionDirection;
-
-  int selectionEnd;
-
-  int selectionStart;
-
-  final int textLength;
-
-  final String type;
-
-  final String validationMessage;
-
-  final _ValidityStateImpl validity;
-
-  String value;
-
-  final bool willValidate;
-
-  String wrap;
-
-  bool checkValidity() native;
-
-  void select() native;
-
-  void setCustomValidity(String error) native;
-
-  void setSelectionRange(int start, int end, [String direction = null]) native;
-}