deleted unused line

src/main/java/Vault.java

@@ -11,7 +11,6 @@ public class Vault implements VaultInterface {
     public boolean haveCapitals;
     public boolean hasSpecialChars;
     public boolean hasNumbers;
-    public String userName;
     public boolean credentialM;
     InputStream inputS = System.in;
     OutputStream outputS = System.out;