Remove some unneeded media.AVDA histograms.

media/gpu/avda_picture_buffer_manager.cc

Index: media/gpu/avda_picture_buffer_manager.cc
diff --git a/media/gpu/avda_picture_buffer_manager.cc b/media/gpu/avda_picture_buffer_manager.cc
index 2a72985817af926c547c625f84b287fc212c756b..8064fa5d31e3d779295cf9abbaf7b92d12a15eba 100644
--- a/media/gpu/avda_picture_buffer_manager.cc
+++ b/media/gpu/avda_picture_buffer_manager.cc
@@ -136,14 +136,6 @@ gl::ScopedJavaSurface AVDAPictureBufferManager::Initialize(
   state_provider_ = state_provider;
   shared_state_ = new AVDASharedState();
 
-  bool using_virtual_context = false;
-  if (gl::GLContext* context = gl::GLContext::GetCurrent()) {
-    if (gl::GLShareGroup* share_group = context->share_group())
-      using_virtual_context =
-          !!share_group->GetSharedContext(gl::GLSurface::GetCurrent());
-  }
-  UMA_HISTOGRAM_BOOLEAN("Media.AVDA.VirtualContext", using_virtual_context);
-
   // Acquire the SurfaceView surface if given a valid id.
   if (surface_view_id != VideoDecodeAccelerator::Config::kNoSurfaceID) {
     return gpu::GpuSurfaceLookup::GetInstance()->AcquireJavaSurface(