Revert "UI: Always create a display capture on first run"

This reverts commit 35b2ce565a2b90909e2b94da5f28de4bb3a87ff0.

There is far too much potential for issues to occur if the first-time
start creates a display capture by default on linux and windows.
Display capture on windows laptops will not be guaranteed to capture
properly, leaving the user with a blank screen.  Display capture on
linux downloads its image off the graphics processor, so it's quite
inefficient to have on by default.

obs/window-basic-main.cpp

@@ -350,31 +350,10 @@ static inline bool HasAudioDevices(const char *source_id)
 	return count != 0;
 }
 
-void OBSBasic::CreateFirstRunSources(obs_scene_t *scene)
+void OBSBasic::CreateFirstRunSources()
 {
 	bool hasDesktopAudio = HasAudioDevices(App()->OutputAudioSource());
 	bool hasInputAudio   = HasAudioDevices(App()->InputAudioSource());
-	const char *displayCaptureType = nullptr;
-	obs_source_t *source = nullptr;
-
-#ifdef __APPLE__
-	displayCaptureType = "display_capture";
-#elif _WIN32
-	if (GetWindowsVersion() >= 0x602)
-		displayCaptureType = "monitor_capture";
-#else //X11
-	displayCaptureType = "xshm_input";
-#endif
-	if (displayCaptureType) {
-		source = obs_source_create(OBS_SOURCE_TYPE_INPUT,
-				displayCaptureType, Str("Basic.DisplayCapture"),
-				NULL, nullptr);
-	}
-	if (source) {
-		obs_scene_add(scene, source);
-		obs_add_source(source);
-		obs_source_release(source);
-	}
 
 	if (hasDesktopAudio)
 		ResetAudioDevice(App()->OutputAudioSource(), "default",
@@ -396,7 +375,7 @@ void OBSBasic::CreateDefaultScene(bool firstStart)
 	obs_add_source(source);
 
 	if (firstStart)
-		CreateFirstRunSources(scene);
+		CreateFirstRunSources();
 
 	obs_set_output_source(0, obs_scene_get_source(scene));
 	obs_scene_release(scene);

obs/window-basic-main.hpp

@@ -117,7 +117,7 @@ private:
 
 	void          SetupEncoders();
 
-	void          CreateFirstRunSources(obs_scene_t *scene);
+	void          CreateFirstRunSources();
 	void          CreateDefaultScene(bool firstStart);
 
 	void          ClearVolumeControls();