UI: Removed unused friend classes

UI/auth-twitch.hpp

@@ -13,8 +13,6 @@ class BrowserDock;
 class TwitchAuth : public OAuthStreamKey {
 	Q_OBJECT
 
-	friend class TwitchLogin;
-
 	bool uiLoaded = false;
 
 	std::string name;

UI/window-basic-main.hpp

@@ -191,7 +191,6 @@ class OBSBasic : public OBSMainWindow {
 	friend class ExtraBrowsersModel;
 	friend class ExtraBrowsersDelegate;
 	friend class DeviceCaptureToolbar;
-	friend class DeviceToolbarPropertiesThread;
 	friend class OBSBasicSourceSelect;
 	friend class OBSYoutubeActions;
 	friend class OBSPermissions;