removeAllKeys does not delete any items that were saved with synchronizable as true

[MujiP]

The query dict passed to SecItemDelete in removeAllKeys does not contain any value for the synchronizable attribute, so it actually defaults to false, deleting only those items that are false, and leaving out items that were saved with true. The same also applies with the wipeKeychain method. We should add a value for sync to specify any.

From the documentation on the sync attribute:

If the key is not supplied, or has a value of kCFBooleanFalse, then no synchronizable items are added or returned. Use kSecAttrSynchronizableAny to query for both synchronizable and non-synchronizable results.