QUITO, Ecuador — Ecuador’s government said yesterday it has cut off WikiLeaks founder Julian Assange’s internet connection at the nation’s London embassy after his recent activity on social media decrying the arrest of a Catalan separatist politician.In a statement, officials said Assange’s recent posts “put at risk” the good relations Ecuador maintains with nations throughout Europe and had decided as of Tuesday to suspend his internet access “in order to prevent any potential harm.”