Remove outdated availability conditions in Showcase #1127

Job	Run time
Lint Podspec	1s
Archive Framework (watchOS)	34s
Archive Framework (visionOS)	36s
Archive Framework (iOS)	35s
Archive Framework (tvOS)	8m 47s
Archive Framework (macOS)	1s
Archive Framework (macCatalyst)	1s
tvOS 15	1s
iOS 17	1s
iOS 26	1s
tvOS 17	8m 47s
iOS 16	1s
iOS 18	8m 47s
tvOS 26	1s
watchOS 8	8m 47s
tvOS 16	1s
tvOS 18	1s
iOS 15	1s
watchOS 9	1s
watchOS 26	1s
watchOS 10	8m 47s
visionOS 26	1s
visionOS 1	1s
visionOS 2	8m 47s
watchOS 11	1s
macOS 15	8m 47s
	1h 3m 30s

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