Revert of ozone: Add ability to set clinet capabilities which we will need for atomic

ui/ozone/platform/drm/test/mock_drm_device.cc

Index: ui/ozone/platform/drm/test/mock_drm_device.cc
diff --git a/ui/ozone/platform/drm/test/mock_drm_device.cc b/ui/ozone/platform/drm/test/mock_drm_device.cc
index aa715f810e2ac2b6e94fade4abc0e4c684357782..eb116239f59b0410330eb1db78b61729d91b48f2 100644
--- a/ui/ozone/platform/drm/test/mock_drm_device.cc
+++ b/ui/ozone/platform/drm/test/mock_drm_device.cc
@@ -229,10 +229,6 @@
   return false;
 }
 
-bool MockDrmDevice::SetCapability(uint64_t capability, uint64_t value) {
-  return false;
-}
-
 void MockDrmDevice::RunCallbacks() {
   while (!callbacks_.empty()) {
     PageFlipCallback callback = callbacks_.front();