remove erroneous comment

fetch.js

@@ -2,7 +2,6 @@ const fs = require('fs');
 const path = require('path');
 
 const exec = require('child_process').exec;
-// this is from the env of npm, not node
 const nodePath = process.execPath;
 const version = process.versions.v8;
 const tmpfile = path.join(__dirname, version+'.flags.json');