remove transactions that have become invalid from the unconfirmed transactions pool
remove transactions that have become invalid from the unconfirmed transactions pool

duckx/nxt,fimkrypto/nxt,fimkrypto/nxt,duckx/nxt,dmkaplan2000/nxt_dmk,dmkaplan2000/nxt_dmk,metrospark/czarcraft,metrospark/czarcraft,fimkrypto/nxt,duckx/nxt,Ziftr/nxt,fimkrypto/nxt,Ziftr/nxt,dmkaplan2000/nxt_dmk,metrospark/czarcraft,Ziftr/nxt