qt: remove redundant wallet methods from bitcoingui

send encryptWallet/backupWallet/changePassphrase directly to walletFrame

src/qt/bitcoingui.h

@@ -186,14 +186,6 @@ private slots:
     /** Handle tray icon clicked */
     void trayIconActivated(QSystemTrayIcon::ActivationReason reason);
 #endif
-    /** Encrypt the wallet */
-    void encryptWallet(bool status);
-    /** Backup the wallet */
-    void backupWallet();
-    /** Change encrypted wallet passphrase */
-    void changePassphrase();
-    /** Ask for passphrase to unlock wallet temporarily */
-    void unlockWallet();
 
     /** Show window if hidden, unminimize when minimized, rise when obscured or show if hidden and fToggleHidden is true */
     void showNormalIfMinimized(bool fToggleHidden = false);