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

Source/modules/quota/StorageInfo.idl

Index: Source/modules/quota/StorageInfo.idl
diff --git a/Source/modules/quota/StorageInfo.idl b/Source/modules/quota/StorageInfo.idl
index ba72a2da4d8ace7faac410b0810a83385105403b..7a0bbcc9f3c05a34d754afa3466467a2266bfde9 100644
--- a/Source/modules/quota/StorageInfo.idl
+++ b/Source/modules/quota/StorageInfo.idl
@@ -29,6 +29,6 @@
     const unsigned short TEMPORARY = 0;
     const unsigned short PERSISTENT = 1;
 
-    [CallWith=ScriptExecutionContext] void queryUsageAndQuota(unsigned short storageType, [Callback] optional StorageUsageCallback usageCallback, [Callback] optional StorageErrorCallback errorCallback);
-    [CallWith=ScriptExecutionContext] void requestQuota(unsigned short storageType, unsigned long long newQuotaInBytes, [Callback] optional StorageQuotaCallback quotaCallback, [Callback] optional StorageErrorCallback errorCallback);
+    [CallWith=ScriptExecutionContext] void queryUsageAndQuota(unsigned short storageType, optional StorageUsageCallback usageCallback, optional StorageErrorCallback errorCallback);
+    [CallWith=ScriptExecutionContext] void requestQuota(unsigned short storageType, unsigned long long newQuotaInBytes, optional StorageQuotaCallback quotaCallback, optional StorageErrorCallback errorCallback);
 };