removed unused constant
removed unused constant

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