Remove generated directories with 100s of files.

client/html/generated/html/frog/FileReader.dart

Index: client/html/generated/html/frog/FileReader.dart
diff --git a/client/html/generated/html/frog/FileReader.dart b/client/html/generated/html/frog/FileReader.dart
deleted file mode 100644
index ce838659227686703011f6e2d24b1c0f9f1a6978..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/FileReader.dart
+++ /dev/null
@@ -1,43 +0,0 @@
-
-class _FileReaderImpl implements FileReader native "*FileReader" {
-
-  static final int DONE = 2;
-
-  static final int EMPTY = 0;
-
-  static final int LOADING = 1;
-
-  final _FileErrorImpl error;
-
-  EventListener onabort;
-
-  EventListener onerror;
-
-  EventListener onload;
-
-  EventListener onloadend;
-
-  EventListener onloadstart;
-
-  EventListener onprogress;
-
-  final int readyState;
-
-  final Object result;
-
-  void abort() native;
-
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-
-  bool dispatchEvent(_EventImpl evt) native;
-
-  void readAsArrayBuffer(_BlobImpl blob) native;
-
-  void readAsBinaryString(_BlobImpl blob) native;
-
-  void readAsDataURL(_BlobImpl blob) native;
-
-  void readAsText(_BlobImpl blob, [String encoding = null]) native;
-
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-}