Update PassBook.java

programs/mutant-5/swen90006/passbook/PassBook.java

@@ -84,9 +84,7 @@ public class PassBook
 	}
 	//check the passphrase strength
 	else {
-	    	if(passbookUsername.length()==0) {
-			throw new WeakPassphraseException(passphrase);
-		}
+
 	    if (passphrase.length() < MINIMUM_PASSPHRASE_LENGTH) {
 		throw new WeakPassphraseException(passphrase);
 	    }