Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/frog/IDBDatabaseException.dart
diff --git a/client/dom/generated/src/frog/IDBDatabaseException.dart b/client/dom/generated/src/frog/IDBDatabaseException.dart
deleted file mode 100644
index 9269c9a830cebb811cdedc2166c0d940434a8a99..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/IDBDatabaseException.dart
+++ /dev/null
@@ -1,37 +0,0 @@
-
-class _IDBDatabaseExceptionJs extends _DOMTypeJs implements IDBDatabaseException native "*IDBDatabaseException" {
-
-  static final int ABORT_ERR = 8;
-
-  static final int CONSTRAINT_ERR = 4;
-
-  static final int DATA_ERR = 5;
-
-  static final int NON_TRANSIENT_ERR = 2;
-
-  static final int NOT_ALLOWED_ERR = 6;
-
-  static final int NOT_FOUND_ERR = 3;
-
-  static final int NO_ERR = 0;
-
-  static final int QUOTA_ERR = 11;
-
-  static final int READ_ONLY_ERR = 9;
-
-  static final int TIMEOUT_ERR = 10;
-
-  static final int TRANSACTION_INACTIVE_ERR = 7;
-
-  static final int UNKNOWN_ERR = 1;
-
-  static final int VER_ERR = 12;
-
-  final int code;
-
-  final String message;
-
-  final String name;
-
-  String toString() native;
-}