Revert of Add documentation to 2 DeprecatedPaintLayer objects

Source/core/paint/DeprecatedPaintLayer.h

Index: Source/core/paint/DeprecatedPaintLayer.h
diff --git a/Source/core/paint/DeprecatedPaintLayer.h b/Source/core/paint/DeprecatedPaintLayer.h
index 93f092fd42a280338bbac2667df0d56e964e7284..07155d41d34941c5cb88ad850524513c4390f61a 100644
--- a/Source/core/paint/DeprecatedPaintLayer.h
+++ b/Source/core/paint/DeprecatedPaintLayer.h
@@ -95,12 +95,6 @@
 // hardware acceleration (through DeprecatedPaintLayerCompositor),
 // scrolling (through DeprecatedPaintLayerScrollableArea)
 // along with some optimizations are all handled by DeprecatedPaintLayer.
-//
-// The class is DEPRECATED, which means that we would like to remove it. The
-// reason for removal is that it has been a dumping ground for features for too
-// long and is the wrong level of abstraction, bearing no correspondence to any
-// CSS concept. Its associated objects and some of its feature need to be
-// migrated to LayoutObject (or the appropriate sub-class).
 class CORE_EXPORT DeprecatedPaintLayer {
     WTF_MAKE_NONCOPYABLE(DeprecatedPaintLayer);
 public: