Remove reference to undefined function

js/crypto.js

@@ -578,7 +578,7 @@ window.textsecure.crypto = function() {
 					closeSession(open_session); // To be returned and saved later
 			} else {
 				// ...otherwise create an error that the UI will pick up and ask the user if they want to re-negotiate
-				throw textsecure.createTryAgainError("Received message with unknown identity key", "The identity of the sender has changed. This may be malicious, or the sender may have simply reinstalled TextSecure.", textsecure.replay.REPLAY_FUNCS.INIT_SESSION, [encodedNumber, getString(message.encode())]);
+				throw new Error("Received message with unknown identity key", "The identity of the sender has changed. This may be malicious, or the sender may have simply reinstalled TextSecure.", textsecure.replay.REPLAY_FUNCS.INIT_SESSION, [encodedNumber, getString(message.encode())]);
 			}
 		}
 		return initSession(false, preKeyPair, signedPreKeyPair, encodedNumber, toArrayBuffer(message.identityKey), toArrayBuffer(message.baseKey), undefined)