PR for proxy checker & code review suggestions

[himanshu-02]

feat(windows): implement proxy checker for BrowserStack connectivity

remove unused code blocks

remove commented-out code

update results link in logs to https://automation.browserstack.com/

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}