Remove generated directories with 100s of files.

client/html/generated/html/dartium/FileEntry.dart

Index: client/html/generated/html/dartium/FileEntry.dart
diff --git a/client/html/generated/html/dartium/FileEntry.dart b/client/html/generated/html/dartium/FileEntry.dart
deleted file mode 100644
index 306fe2063be49a2bccc10995604c4836289e68d6..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/FileEntry.dart
+++ /dev/null
@@ -1,24 +0,0 @@
-
-class _FileEntryImpl extends _EntryImpl implements FileEntry {
-  _FileEntryImpl._wrap(ptr) : super._wrap(ptr);
-
-  void createWriter(FileWriterCallback successCallback, [ErrorCallback errorCallback = null]) {
-    if (errorCallback === null) {
-      _ptr.createWriter(_unwrap(successCallback));
-      return;
-    } else {
-      _ptr.createWriter(_unwrap(successCallback), _unwrap(errorCallback));
-      return;
-    }
-  }
-
-  void file(FileCallback successCallback, [ErrorCallback errorCallback = null]) {
-    if (errorCallback === null) {
-      _ptr.file(_unwrap(successCallback));
-      return;
-    } else {
-      _ptr.file(_unwrap(successCallback), _unwrap(errorCallback));
-      return;
-    }
-  }
-}