Mac: Delete now-dead elastic overscroll code

LayoutTests/NeverFixTests

Index: LayoutTests/NeverFixTests
diff --git a/LayoutTests/NeverFixTests b/LayoutTests/NeverFixTests
index f8e9365c8a21f21e2425d001d528842b03c10174..b71088f05812c4c00d0a6ae0606972448876806a 100644
--- a/LayoutTests/NeverFixTests
+++ b/LayoutTests/NeverFixTests
@@ -45,11 +45,6 @@ fast/harness/sample-fail-mismatch-reftest.html [ WontFix ]
 # <progress> on Mac is always animated. So it's hard to get a reliable pixel result.
 [ Mac ] fast/dom/HTMLProgressElement/progress-element.html [ WontFix ]
 
-# These test rubber band overhang drawing, which is a Mac OS X Lion feature
-# that is not supported on other platforms.
-[ Win Linux ] rubberbanding [ WontFix ]
-[ Win Linux ] compositing/rubberbanding [ WontFix ]
-
 # This requires usp10.dll version 1.600 or greater on Windows and
 # it isn't installed on XP by default.
 [ XP ] css3/font-feature-settings-rendering.html [ WontFix ]
@@ -187,4 +182,4 @@ virtual/threaded/printing/width-overflow.html [ WontFix ]
 virtual/deferred/inspector/tracing/paint-command-log-nodes.html [ WontFix ]
 
 # This test only fails with an ASSERT in Debug build.
-[ Release ] editing/input/orphan-set-selection-range.html [ WontFix ]
+[ Release ] editing/input/orphan-set-selection-range.html [ WontFix ]