chore: remove reference to closed upstream PR from migration files #2785

Job	Run time
Run HSM tests	3m 18s
Run OIDC conformity tests	11m 34s
Run tests and lints	3m 39s
Run end-to-end tests (memory)	5m 32s
Run end-to-end tests (memory, --jwt)	5m 25s
Run end-to-end tests (postgres)	5m 31s
Run end-to-end tests (mysql)	5m 59s
Run end-to-end tests (postgres, --jwt)	5m 38s
Run end-to-end tests (mysql, --jwt)	5m 37s
Run end-to-end tests (cockroach)	6m 30s
Run end-to-end tests (cockroach, --jwt)	6m 46s
Build CLI docs	0s
Generate release	0s
Pending approval Slack notification	0s
Draft newsletter	0s
Send newsletter	0s
	1h 5m 29s

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