Remove generated directories with 100s of files.

client/html/generated/html/dartium/FileWriter.dart

Index: client/html/generated/html/dartium/FileWriter.dart
diff --git a/client/html/generated/html/dartium/FileWriter.dart b/client/html/generated/html/dartium/FileWriter.dart
deleted file mode 100644
index 09d60fc6b3d82e162ef7ac16cad2329b7ec7ad33..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/FileWriter.dart
+++ /dev/null
@@ -1,56 +0,0 @@
-
-class _FileWriterImpl extends _DOMTypeBase implements FileWriter {
-  _FileWriterImpl._wrap(ptr) : super._wrap(ptr);
-
-  FileError get error() => _wrap(_ptr.error);
-
-  int get length() => _wrap(_ptr.length);
-
-  EventListener get onabort() => _wrap(_ptr.onabort);
-
-  void set onabort(EventListener value) { _ptr.onabort = _unwrap(value); }
-
-  EventListener get onerror() => _wrap(_ptr.onerror);
-
-  void set onerror(EventListener value) { _ptr.onerror = _unwrap(value); }
-
-  EventListener get onprogress() => _wrap(_ptr.onprogress);
-
-  void set onprogress(EventListener value) { _ptr.onprogress = _unwrap(value); }
-
-  EventListener get onwrite() => _wrap(_ptr.onwrite);
-
-  void set onwrite(EventListener value) { _ptr.onwrite = _unwrap(value); }
-
-  EventListener get onwriteend() => _wrap(_ptr.onwriteend);
-
-  void set onwriteend(EventListener value) { _ptr.onwriteend = _unwrap(value); }
-
-  EventListener get onwritestart() => _wrap(_ptr.onwritestart);
-
-  void set onwritestart(EventListener value) { _ptr.onwritestart = _unwrap(value); }
-
-  int get position() => _wrap(_ptr.position);
-
-  int get readyState() => _wrap(_ptr.readyState);
-
-  void abort() {
-    _ptr.abort();
-    return;
-  }
-
-  void seek(int position) {
-    _ptr.seek(_unwrap(position));
-    return;
-  }
-
-  void truncate(int size) {
-    _ptr.truncate(_unwrap(size));
-    return;
-  }
-
-  void write(Blob data) {
-    _ptr.write(_unwrap(data));
-    return;
-  }
-}