Remove generated directories with 100s of files.

client/dom/generated/src/frog/EventSource.dart

Index: client/dom/generated/src/frog/EventSource.dart
diff --git a/client/dom/generated/src/frog/EventSource.dart b/client/dom/generated/src/frog/EventSource.dart
deleted file mode 100644
index 4e85b001dc3810567361ad17c622b25f7b6c8b72..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/EventSource.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-
-class _EventSourceJs extends _EventTargetJs implements EventSource native "*EventSource" {
-
-  static final int CLOSED = 2;
-
-  static final int CONNECTING = 0;
-
-  static final int OPEN = 1;
-
-  final String URL;
-
-  final int readyState;
-
-  final String url;
-
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-
-  void close() native;
-
-  bool dispatchEvent(_EventJs evt) native;
-
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-}