Remove Achievements/Leaderboards/RP Enabled settings

The RetroAchievements client object now handles these three settings as a singular "spectator" mode that will be added in a future commit.

Source/Core/DolphinQt/Achievements/AchievementSettingsWidget.h

@@ -32,9 +32,6 @@ private:
   void ToggleRAIntegration();
   void Login();
   void Logout();
-  void ToggleAchievements();
-  void ToggleLeaderboards();
-  void ToggleRichPresence();
   void ToggleHardcore();
   void ToggleProgress();
   void ToggleBadges();
@@ -51,9 +48,6 @@ private:
   QLineEdit* m_common_password_input;
   QPushButton* m_common_login_button;
   QPushButton* m_common_logout_button;
-  ToolTipCheckBox* m_common_achievements_enabled_input;
-  ToolTipCheckBox* m_common_leaderboards_enabled_input;
-  ToolTipCheckBox* m_common_rich_presence_enabled_input;
   ToolTipCheckBox* m_common_hardcore_enabled_input;
   ToolTipCheckBox* m_common_progress_enabled_input;
   ToolTipCheckBox* m_common_badges_enabled_input;