chore: remove OnSourceAdded (re-add in the future)

shell/browser/api/electron_api_desktop_capturer.cc

@@ -238,12 +238,6 @@ void DesktopCapturer::DesktopListListener::OnDelegatedSourceListSelection() {
   }
 }
 
-void DesktopCapturer::DesktopListListener::OnSourceAdded(int index) {
-  // TODO: Implement the wrapped DesktopCapturer::RequestUpdate callback
-  // here for native pickers, instead of in the screen/window implementation
-  // below
-}
-
 void DesktopCapturer::DesktopListListener::OnSourceThumbnailChanged(int index) {
   if (have_selection_) {
     // This is called every time a thumbnail is refreshed. Reset variable to

shell/browser/api/electron_api_desktop_capturer.h

@@ -78,7 +78,7 @@ class DesktopCapturer final : public gin::Wrappable<DesktopCapturer>,
     ~DesktopListListener() override;
 
    protected:
-    void OnSourceAdded(int index) override;
+    void OnSourceAdded(int index) override {}
     void OnSourceRemoved(int index) override {}
     void OnSourceMoved(int old_index, int new_index) override {}
     void OnSourceNameChanged(int index) override {}