Reuse some iOS code in tvOS UI tests

Passepartout/UITests/Extensions/XCTestCase+Extensions.swift

@@ -88,7 +88,7 @@ extension XCUIApplicationProviding where Self: XCTestCase {
     }
 
     private func container(for target: ScreenshotTarget) -> XCUIElement {
-#if os(iOS)
+#if os(iOS) || os(tvOS)
         app.windows.firstMatch
 #else
         switch target {

Passepartout/UITests/Extensions/XCUIElement+Extensions.swift

@@ -42,14 +42,14 @@ extension XCUIElement {
 
 private extension XCUIElement {
     func query(for elementType: AccessibilityInfo.ElementType) -> XCUIElementQuery {
-#if os(iOS)
+#if os(iOS) || os(tvOS)
         switch elementType {
         case .button, .link, .menu, .menuItem:
             return buttons
         case .text:
             return staticTexts
         }
-#elseif os(macOS)
+#else
         switch elementType {
         case .button, .link:
             return buttons
@@ -60,13 +60,6 @@ private extension XCUIElement {
         case .text:
             return staticTexts
         }
-#else
-        switch elementType {
-        case .button, .link, .menu, .menuItem:
-            return buttons
-        case .text:
-            return staticTexts
-        }
 #endif
     }
 }