chore!: remove `MinShareCount` constant #4966

Job	Run time
docker-security-build / prepare-env	3s
docker-txsim-build / prepare-env	7s
docker-security-build / docker-security	3m 4s
docker-txsim-build / docker-security	4m 17s
docker-security-build / docker-build	2m 55s
docker-txsim-build / docker-build	2m 55s
	13m 21s

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