Get rid of [Callback] extended attribute for parameters in IDL files

Source/modules/filesystem/DirectoryEntry.idl

Index: Source/modules/filesystem/DirectoryEntry.idl
diff --git a/Source/modules/filesystem/DirectoryEntry.idl b/Source/modules/filesystem/DirectoryEntry.idl
index 9a44cf6215fd1edd4ba4cc3fe8947abc743379c4..f77a4e95a5495473d362be5f4fd8365e313d2f0a 100644
--- a/Source/modules/filesystem/DirectoryEntry.idl
+++ b/Source/modules/filesystem/DirectoryEntry.idl
@@ -30,7 +30,7 @@
 
 interface DirectoryEntry : Entry {
     DirectoryReader createReader();
-    void getFile([TreatNullAs=NullString, TreatUndefinedAs=NullString] DOMString path, optional Dictionary options, [Callback] optional EntryCallback successCallback, [Callback] optional ErrorCallback errorCallback);
-    void getDirectory([TreatNullAs=NullString, TreatUndefinedAs=NullString] DOMString path, optional Dictionary options, [Callback] optional EntryCallback successCallback, [Callback] optional ErrorCallback errorCallback);
-    void removeRecursively([Callback] VoidCallback successCallback, [Callback] optional ErrorCallback errorCallback);
+    void getFile([TreatNullAs=NullString, TreatUndefinedAs=NullString] DOMString path, optional Dictionary options, optional EntryCallback successCallback, optional ErrorCallback errorCallback);
+    void getDirectory([TreatNullAs=NullString, TreatUndefinedAs=NullString] DOMString path, optional Dictionary options, optional EntryCallback successCallback, optional ErrorCallback errorCallback);
+    void removeRecursively(VoidCallback successCallback, optional ErrorCallback errorCallback);
 };