Remove PowerPoint fullscreen heuristic control method

This method was kept to avoid breaking the Chromium build and its usage
in Chromium has now been removed.

Bug: chromium:409473386
Change-Id: Idfc09f9b15929e4ed66d38bdea4d9807e17484f5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/484640
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Commit-Queue: Palak Agarwal <agpalak@google.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#48167}

modules/desktop_capture/full_screen_window_detector.h

diff --git a/modules/desktop_capture/full_screen_window_detector.h b/modules/desktop_capture/full_screen_window_detector.h
index 90f125e..717a31e 100644
--- a/modules/desktop_capture/full_screen_window_detector.h
+++ b/modules/desktop_capture/full_screen_window_detector.h
@@ -47,10 +47,6 @@
   FullScreenWindowDetector(const FullScreenWindowDetector&) = delete;
   FullScreenWindowDetector& operator=(const FullScreenWindowDetector&) = delete;
 
-  void SetHeuristicForFindingEditor(bool use_heuristic) {
-    // TODO(crbug.com/409473386): Delete this method once its usage is removed.
-  }
-
   // Returns the full-screen window in place of the original window if all the
   // criteria provided by FullScreenApplicationHandler are met, or 0 if no such
   // window found.