Remove engine requirements.txt file

[opsdisk]

Not needed

https://github.com/opsdisk/scantron/blob/master/engine/requirements.txt

[RishiKumarRay]

Do we have to just delete this file?

[opsdisk]

Yup!

[RishiKumarRay]

@opsdisk done this too #7 , please do the review and would like to request you to add my name in contributors file

[RishiKumarRay]

@opsdisk please review and merge #7

[opsdisk]

Thanks @RishiKumarRay - may be a while until I can focus on this project.