chore: remove React Native 0.71 leftover in `build.gradle` #873

Job	Run time
build (macos, fabric-view, kotlin-objc)	3m 8s
build (macos, legacy-module, cpp)	3m 18s
build (macos, legacy-module, kotlin-swift)	3m 47s
build (macos, legacy-module, kotlin-objc)	3m 10s
build (macos, legacy-view, kotlin-swift)	3m 21s
build (macos, legacy-view, kotlin-objc)	3m 20s
build (macos, turbo-module, kotlin-objc)	2m 40s
build (macos, turbo-module, cpp)	2m 31s
build (ubuntu, fabric-view, kotlin-objc)	4m 19s
build (ubuntu, legacy-module, cpp)	4m 21s
build (ubuntu, legacy-module, kotlin-swift)	1m 12s
build (ubuntu, legacy-module, kotlin-objc)	1m 59s
build (ubuntu, legacy-view, kotlin-swift)	1m 40s
build (ubuntu, legacy-view, kotlin-objc)	4m 17s
build (ubuntu, library, js)	1m 58s
build (ubuntu, turbo-module, kotlin-objc)	1m 53s
build (ubuntu, turbo-module, cpp)	1m 58s
	48m 52s

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