Remove pixel format check from DesktopFrame constructor

Chromium will start using non ARGB formats, so remove this.

Bug: webrtc:436974448
Test: CQ
Change-Id: I8f065b728220e28a06f2f4964cdc108ddc9b8bde
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/404880
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Eliot Courtney <edcourtney@google.com>
Cr-Commit-Position: refs/heads/main@{#45375}

modules/desktop_capture/desktop_frame.cc

diff --git a/modules/desktop_capture/desktop_frame.cc b/modules/desktop_capture/desktop_frame.cc
index 830788c..1f0f604 100644
--- a/modules/desktop_capture/desktop_frame.cc
+++ b/modules/desktop_capture/desktop_frame.cc
@@ -39,8 +39,6 @@
       capturer_id_(DesktopCapturerId::kUnknown) {
   RTC_DCHECK(size_.width() >= 0);
   RTC_DCHECK(size_.height() >= 0);
-  // TODO(bugs.webrtc.org/436974448): Support other pixel formats.
-  RTC_CHECK_EQ(FOURCC_ARGB, pixel_format_);
 }
 
 DesktopFrame::DesktopFrame(DesktopSize size,