Remove legacy architecture stub `UIImplementation` (#56939) #39584

Job	Run time
set_release_type	3s
check_code_changes	9s
lint	1m 59s
build_android	12m 40s
prebuild_apple_dependencies	0s
build_debugger_shell	0s
test_ios_rntester	-1s
prebuild_react_native_core	-1s
test_ios_helloworld	-1s
test_ios_rntester_dynamic_frameworks	-1s
test_ios_rntester_ruby_3_2_0	-1s
test_e2e_ios_rntester	-1s
test_ios_helloworld_with_ruby_3_2_0	-1s
test_e2e_ios_rntester_retry_1	-1s
test_e2e_ios_rntester_retry_2	0s
test_js (24)	3m 36s
build_fantom_runner	11m 15s
test_js (22.13.0)	3m 52s
build_js_types	59s
build_npm_package	2m 42s
test_e2e_android_rntester / test (debug)	8m 14s
test_e2e_android_rntester / test (release)	7m 26s
run_fantom_tests / test	1m 55s
run_fantom_tests / report	2s
run_fantom_tests_retry_1 / test	2m 2s
test_android_helloworld (Release)	5m 45s
test_android_helloworld (Debug)	5m 31s
test_e2e_android_templateapp / test (release)	8m 22s
test_e2e_android_templateapp / test (debug)	8m 3s
test_e2e_ios_templateapp	0s
test_e2e_ios_templateapp_retry_1	0s
test_e2e_ios_templateapp_retry_2	0s
run_fantom_tests_retry_1 / report	3s
run_fantom_tests_retry_2 / test	1m 56s
run_fantom_tests_retry_2 / report	2s
test_e2e_android_rntester / report	2s
test_e2e_android_rntester_retry_1	0s
test_e2e_android_rntester_retry_2	-1s
test_e2e_android_templateapp / report	3s
test_e2e_android_templateapp_retry_1	0s
test_e2e_android_templateapp_retry_2	0s
	1h 26m 32s

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