walletdb.h: remove dead code
walletdb.h: remove dead code

TheNameIsNigel/paycoin,Iamhumanareyou/EmprendeCoin,PaycoinFoundation/paycoin,PaycoinFoundation/paycoin,TheNameIsNigel/paycoin,thommyV91/Suck-a-Coin,IngCr3at1on/paycoin,Iamhumanareyou/EmprendeCoin,mitchellcash/paycoin,LambocoinFoundation/Lambocoin,IngCr3at1on/paycoin,thommyV91/Suck-a-Coin,TheNameIsNigel/paycoin,mitchellcash/paycoin,TheNameIsNigel/paycoin,IngCr3at1on/paycoin,Iamhumanareyou/EmprendeCoin,Iamhumanareyou/EmprendeCoin,mitchellcash/paycoin,mitchellcash/paycoin,PaycoinFoundation/paycoin,thommyV91/Suck-a-Coin,LambocoinFoundation/Lambocoin,LambocoinFoundation/Lambocoin,IngCr3at1on/paycoin,ligerzero459/paycoin,ligerzero459/paycoin,PaycoinFoundation/paycoin,thommyV91/Suck-a-Coin,ligerzero459/paycoin,LambocoinFoundation/Lambocoin,ligerzero459/paycoin