Remove generated directories with 100s of files.

client/html/generated/html/dartium/DedicatedWorkerContext.dart

Index: client/html/generated/html/dartium/DedicatedWorkerContext.dart
diff --git a/client/html/generated/html/dartium/DedicatedWorkerContext.dart b/client/html/generated/html/dartium/DedicatedWorkerContext.dart
deleted file mode 100644
index 1eeca9324e669df0f8d0a4bbf4063fddb1e70556..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/DedicatedWorkerContext.dart
+++ /dev/null
@@ -1,28 +0,0 @@
-
-class _DedicatedWorkerContextImpl extends _WorkerContextImpl implements DedicatedWorkerContext {
-  _DedicatedWorkerContextImpl._wrap(ptr) : super._wrap(ptr);
-
-  EventListener get onmessage() => _wrap(_ptr.onmessage);
-
-  void set onmessage(EventListener value) { _ptr.onmessage = _unwrap(value); }
-
-  void postMessage(Object message, [List messagePorts = null]) {
-    if (messagePorts === null) {
-      _ptr.postMessage(_unwrap(message));
-      return;
-    } else {
-      _ptr.postMessage(_unwrap(message), _unwrap(messagePorts));
-      return;
-    }
-  }
-
-  void webkitPostMessage(Object message, [List transferList = null]) {
-    if (transferList === null) {
-      _ptr.webkitPostMessage(_unwrap(message));
-      return;
-    } else {
-      _ptr.webkitPostMessage(_unwrap(message), _unwrap(transferList));
-      return;
-    }
-  }
-}