Remove getter for override keys

The override keys are never changed. Therefore the getter is currently
pretty useless.

GnuPG-bug-id: 5283

src/kleo/keyresolver.cpp

@@ -571,11 +571,6 @@ QMap <Protocol, std::vector<Key> > KeyResolver::signingKeys() const
     return d->mSigKeys;
 }
 
-QMap <Protocol, QMap<QString, QStringList> > KeyResolver::overrideKeys() const
-{
-    return d->mOverrides;
-}
-
 void KeyResolver::setDialogWindowFlags(Qt::WindowFlags flags)
 {
     d->mDialogWindowFlags = flags;

src/kleo/keyresolver.h

@@ -167,14 +167,6 @@ public:
      */
     void start(bool showApproval, QWidget *parentWidget = nullptr);
 
-    /**
-     * Access possibly updated Override Keys
-     *
-     * @return A map of email's with new overrides and the according
-     *         cryptoformat / fingerprint. Should be saved somehow.
-     */
-    QMap <GpgME::Protocol, QMap<QString, QStringList> > overrideKeys() const;
-
     /**
      * Set window flags for a possible dialog.
      */