ETHEREUM_PRIVATE_KEY leaked

## Summary: I found below private key for ethereum wallet leaked via public code in github repository ``` ETHEREUM_PRIVATE_KEY="c87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3" ``` ## Steps To Reproduce: You can find private key via below link : >https://github.com/Sifchain/sifnode/blob/5d222e51f10665322ddb5301a4eb54df37974310/smart-contracts/Deployment.md ## Impact : This private key for ethereum wallet allow to someone to send Ether from the address to another address . I didn't try anything with this key to avoid violation policy of program . ## Impact ETHEREUM_PRIVATE_KEY leaked