Remove method for hiding shortcut column in ProfileSettings

Konsole::Part was the only user of that method, but since 5168fa3c24
this whole dialog can't be opened from the Part.

src/settings/ProfileSettings.cpp

@@ -196,8 +196,3 @@ bool ProfileSettings::isProfileWritable(Profile::Ptr profile) const
     return profile && !profile->isBuiltin() // Built-in profile is hardcoded and never stored.
         && QFileInfo(profile->path()).isWritable();
 }
-
-void ProfileSettings::setShortcutEditorVisible(bool visible)
-{
-    profileListView->setColumnHidden(ProfileModel::SHORTCUT, !visible);
-}

src/settings/ProfileSettings.h

@@ -43,17 +43,6 @@ public:
     explicit ProfileSettings(QWidget *parent = nullptr);
     ~ProfileSettings() override;
 
-    /**
-     * Specifies whether the shortcut editor should be show.
-     * The shortcut editor allows shortcuts to be associated with
-     * profiles.  When a shortcut is changed, the dialog will call
-     * SessionManager::instance()->setShortcut() to update the shortcut
-     * associated with the profile.
-     *
-     * By default the editor is visible.
-     */
-    void setShortcutEditorVisible(bool visible);
-
 private Q_SLOTS:
     friend class MainWindow;
     void slotAccepted();