valgrind: remove rest_blockhash_by_height suppression
valgrind: remove rest_blockhash_by_height suppression

This should no-longer be necessary after #18785.


Former-commit-id: 6d391e8b93b1583590d67b6b1a96dadacc05463d
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin