ICU-22938 Remove Known Issue subtags for "und_Hant_CN" #2976

Job	Run time
clang-valgrind-intltest (utility)	7m 12s
clang-valgrind-intltest (normalize)	6m 23s
clang-valgrind-test	10m 24s
clang-valgrind-intltest (collator)	5m 14s
clang-valgrind-intltest (regex)	5m 43s
clang-valgrind-intltest (format)	16m 2s
clang-valgrind-intltest (translit)	6m 47s
clang-valgrind-intltest (rbbi)	7m 58s
clang-valgrind-intltest (rbnf)	6m 28s
clang-valgrind-intltest (rbnfrt)	6m 50s
clang-valgrind-intltest (icuserv)	5m 29s
clang-valgrind-intltest (idna)	5m 46s
clang-valgrind-intltest (convert)	6m 59s
clang-valgrind-intltest (rbnfp)	5m 37s
clang-valgrind-intltest (csdet)	5m 21s
clang-valgrind-intltest (spoof)	5m 47s
clang-valgrind-intltest (bidi)	5m 56s
	1h 59m 56s

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