Revert "CORE: Introduce a code path in "ProcessPriorityRequests" to handle headers (with no data) that have already been marked as valid"
Revert "CORE: Introduce a code path in "ProcessPriorityRequests" to handle headers (with no data) that have already been marked as valid"

This reverts commit 462956052a3f480e0626197f409d62ed47a96788.

nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official