Let mac users choose their VBO fate

indra/llrender/llvertexbuffer.cpp

@@ -767,19 +767,10 @@ void LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
 
 BOOL LLVertexBuffer::useVBOs() const
 {
-	//it's generally ineffective to use VBO for things that are streaming on apple
-		
-#if LL_DARWIN
-	if (!mUsage || mUsage == GL_STREAM_DRAW_ARB)
-	{
-		return FALSE;
-	}
-#else
 	if (!mUsage)
 	{
 		return FALSE;
 	}
-#endif
 	return TRUE;
 }