Coding Standards: Remove extra conditional in `is_super_admin()`. #12585

Job	Run time
Run performance tests (with memcached)	10m 31s
Run performance tests	9m 47s
Slack Notifications / Prepare notifications	5s
Slack Notifications / Cancelled notifications	0s
Slack Notifications / Success notifications	3s
Slack Notifications / Fixed notifications	0s
Slack Notifications / Failure notifications	0s
Failed workflow tasks	0s
	20m 26s

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