chore!: remove `MinShareCount` constant #4967

Job	Run time
docker-security-build / prepare-env	6s
docker-txsim-build / prepare-env	3s
docker-txsim-build / docker-security	3m 10s
docker-security-build / docker-security	2m 58s
docker-security-build / docker-build	2m 52s
docker-txsim-build / docker-build	3m 4s
	12m 13s

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