Simple module to clear /proc/pid/environ. Also clears process.env.

TEST=test node
> console.log(process.env.TEST) // test
> /[a-zA-Z0-9]/.test(fs.readFileSync(`/proc/${process.pid}/environ`, 'utf8')) // true
> require('clear-env')()
> console.log(process.env.TEST) // undefined
> console.log(process.env) // {}
> /[a-zA-Z0-9]/.test(fs.readFileSync(`/proc/${process.pid}/environ`, 'utf8')) // false