Remove dead updateLayout JS→native bridge path

Now that both platforms observe content height natively (iOS via KVO,
Android via OnLayoutChangeListener), the JS-callable updateLayout()
is unused. Remove:

- updateLayout() and prevLayoutDetentIdentifier from iOS SheetView
- AsyncFunction("updateLayout") from both platform module definitions
- updateLayout method from the JS BottomSheetNativeComponent

Android's updateLayout() is kept as a private implementation detail
since the keyboard insets listener and native layout observer both
call it internally.

https://claude.ai/code/session_01Rp7ef1h3fKh6fhStcjqLJ5

modules/bottom-sheet/android/src/main/java/expo/modules/bottomsheet/BottomSheetModule.kt

@@ -25,10 +25,6 @@ class BottomSheetModule : Module() {
           view.dismiss()
         }
 
-        AsyncFunction("updateLayout") { view: BottomSheetView ->
-          view.updateLayout()
-        }
-
         Prop("disableDrag") { view: BottomSheetView, prop: Boolean ->
           view.disableDrag = prop
         }