Remove scroll view snapshot tests and fix UIView index-API test

Remove scroll view snapshot tests that were added without reference
images. Update testViewContainerResolvesElementsViaIndexAPIs to assert
the correct VoiceOver-matching behavior: UIViews are traversed via
their subview hierarchy, not the index-based container APIs.

Author: RoyalPineapple

Example/AccessibilitySnapshot/ScrollViewAccessibilityViewController.swift

@@ -1064,19 +1064,13 @@ final class AccessibilityHierarchyParserTests: XCTestCase {
         XCTAssertTrue(elements.isEmpty, "Expected zero count to be treated as no elements, got: \(elements)")
     }
 
-    /// A `UIView` that exposes its children only through the index-based container APIs (nil
-    /// `accessibilityElements`) is resolved through that fallback, just like a non-`UIView` container
-    /// and just like VoiceOver consumes a `UIAccessibilityContainer`. Because the view vends elements
-    /// through the index APIs, those take precedence over subview traversal (the parser enters the
-    /// explicit-elements branch and skips the subview branch) — matching VoiceOver, which ignores the
-    /// subview tree once a view implements the container APIs. Standard UIKit views are unaffected:
-    /// they either populate `accessibilityElements` or report `NSNotFound` (see the PR description for
-    /// the full investigation).
-    func testViewContainerResolvesElementsViaIndexAPIs() {
+    /// A `UIView` that implements `accessibilityElementCount()` / `accessibilityElement(at:)` but
+    /// leaves `accessibilityElements` nil is traversed via its subview hierarchy, not the index APIs.
+    /// VoiceOver walks the subview tree for UIView-backed containers — the index-API fallback only
+    /// applies to non-UIView containers (e.g. `UIAccessibilityElement` subclasses).
+    func testViewContainerWalksSubviewsNotIndexAPIs() {
         let rootView = IndexAPIView(frame: .init(x: 0, y: 0, width: 200, height: 100))
 
-        // A subview that the subview-iteration branch would otherwise surface. Since the view vends
-        // elements through the index APIs, the index-vended phantom takes precedence instead.
         let realSubview = UIView(frame: .init(x: 0, y: 0, width: 200, height: 40))
         realSubview.isAccessibilityElement = true
         realSubview.accessibilityLabel = "Real Subview"
@@ -1090,7 +1084,7 @@ final class AccessibilityHierarchyParserTests: XCTestCase {
             userInterfaceIdiomProvider: TestUserInterfaceIdiomProvider(userInterfaceIdiom: .phone)
         ).flattenToElements().map { $0.description }
 
-        XCTAssertEqual(elements, ["Phantom Element"])
+        XCTAssertEqual(elements, ["Real Subview"])
     }
 
     /// End-to-end regression guard for a real `UISegmentedControl`. It vends its segments through