remove unused method
remove unused method

ddworken/pyethereum,harlantwood/pyethereum,vaporry/pyethereum,ckeenan/pyethereum,ethermarket/pyethereum,inzem77/pyethereum,karlfloersch/pyethereum,ethereum/pyethereum,shahankhatch/pyethereum,karlfloersch/pyethereum,jnnk/pyethereum,pipermerriam/pyethereum,holiman/pyethereum,shahankhatch/pyethereum,ethers/pyethereum,ethereum/pyethereum,pipermerriam/pyethereum