Delete some dead ScrollAlignment code.

sky/engine/core/editing/EditingBehavior.h

Index: sky/engine/core/editing/EditingBehavior.h
diff --git a/sky/engine/core/editing/EditingBehavior.h b/sky/engine/core/editing/EditingBehavior.h
index 026331a01a8e944f78981445b2951f4b285ff5b1..1a6d45dbed4ba62205df89c053797522ad95dfcf 100644
--- a/sky/engine/core/editing/EditingBehavior.h
+++ b/sky/engine/core/editing/EditingBehavior.h
@@ -46,10 +46,6 @@ public:
     // mouse-based or keyboard-based.
     bool shouldConsiderSelectionAsDirectional() const { return true; }
 
-    // On Mac, when revealing a selection (for example as a result of a Find operation on the Browser),
-    // content should be scrolled such that the selection gets certer aligned.
-    bool shouldCenterAlignWhenSelectionIsRevealed() const { return false; }
-
     // On Mac, style is considered present when present at the beginning of selection. On other platforms,
     // style has to be present throughout the selection.
     bool shouldToggleStyleBasedOnStartOfSelection() const { return false; }