Remove more scrolling code from Sky

sky/engine/platform/RuntimeEnabledFeatures.in

Index: sky/engine/platform/RuntimeEnabledFeatures.in
diff --git a/sky/engine/platform/RuntimeEnabledFeatures.in b/sky/engine/platform/RuntimeEnabledFeatures.in
index a3eb1fc7970b492e2976cf3620c5c74f6e713328..9feb60ce03bc201f26fdda6df277844523e7b453 100644
--- a/sky/engine/platform/RuntimeEnabledFeatures.in
+++ b/sky/engine/platform/RuntimeEnabledFeatures.in
@@ -34,7 +34,6 @@ ClientHintsDpr status=experimental
 Crypto status=stable
 CSSAttributeCaseSensitivity status=experimental
 CSSMaskSourceType status=experimental
-CSSOMSmoothScroll status=experimental
 CSSTouchActionDelay status=test
 CSSViewport status=experimental
 CSS3Text status=experimental
@@ -49,7 +48,6 @@ EncryptedMediaAnyVersion status=stable
 ExecCommandInJavaScript status=test
 ExperimentalCanvasFeatures status=test
 ExperimentalWebSocket status=stable
-FastMobileScrolling
 FileAPIBlobClose status=experimental
 FileConstructor status=stable
 FileSystem status=stable
@@ -88,10 +86,6 @@ RegionBasedColumns status=experimental
 RequestAutocomplete status=test
 ScreenOrientation status=stable
 
-// Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
-// as per the spec, matching other Web engines.
-ScrollTopLeftInterop status=experimental
-
 SessionStorage status=stable
 PictureSizes status=stable
 Picture status=stable