Remove suppressed warnings when running openapi tools #1646

Job	Run time
static-analysis (8.3, cs)	39s
static-analysis (8.3, stan)	30s
static-analysis (8.3, openapi:validate)	17s
api-tests / tests (8.3)	1m 11s
cli-tests / tests (8.3)	36s
api-tests / tests (8.4)	1m 14s
unit-tests / tests (8.3)	29s
cli-tests / tests (8.4)	35s
unit-tests / tests (8.4)	27s
db-tests (maria) / db-tests (8.3)	36s
db-tests (ms) / db-tests (8.3)	53s
db-tests (maria) / db-tests (8.4)	25s
db-tests (ms) / db-tests (8.4)	1m 0s
db-tests (mysql) / db-tests (8.3)	30s
db-tests (postgres) / db-tests (8.3)	22s
db-tests (mysql) / db-tests (8.4)	33s
db-tests (postgres) / db-tests (8.4)	34s
db-tests (sqlite:ci) / db-tests (8.3)	18s
db-tests (sqlite:ci) / db-tests (8.4)	20s
upload-coverage (8.3)	21s
delete-artifacts	2s
	11m 52s

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