Remove krb5_get_max_time_skew portability hack (#1875) #39

Job	Run time
functionality-tests	16m 57s
CodeQL-tests	34m 50s
source-maintenance-tests	2m 50s
build-tests(ubuntu-22.04,gcc,default)	11m 44s
build-tests(ubuntu-22.04,gcc,minimal)	6m 4s
build-tests(ubuntu-22.04,gcc,maximus)	12m 6s
build-tests(ubuntu-22.04,clang,default)	12m 57s
build-tests(ubuntu-22.04,clang,minimal)	7m 23s
build-tests(ubuntu-22.04,clang,maximus)	15m 12s
	2h 0m 3s

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