DOC Remove reference to getCMSValidator in code comment #1819

Job	Run time
CI / Generate matrix	11s
CI / Context	1s
CI / Check governance	0s
CI / 8.3 prf-low mariadb phpunit all	2m 34s
CI / 8.3 mysql80 phpunit all	2m 9s
CI / 8.4 mysql84 phpunit all	2m 34s
CI / 8.3 mysql80 phplinting	1m 37s
CI / 8.3 mysql80 endtoend root job1	12m 7s
CI / 8.4 mysql84 endtoend root job1	14m 7s
CI / 8.3 mysql80 endtoend root job2	9m 35s
CI / 8.4 mysql84 endtoend root job2	8m 10s
CI / 8.3 mysql80 endtoend root job3	10m 24s
CI / 8.4 mysql84 endtoend root job3	8m 59s
CI / 8.3 mysql80 js	5m 9s
CI / Dispatch tag patch release	0s
	1h 17m 37s

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