Removed some deprecated packages, also made some documentation changes.

[Vijendra-ultra]

Hi Samagra44,

     I hope you're doing good. Coming to pull request that I've made removed some **deprecated packages** . Also made a slight change in README.md where it is mentioned to run the app by **streamlit run app.py**. First we should go to src folder to run the previous command. There is reference error to models where we should "../models/_model_names_".

           Hope I made some valuable changes. I will look forward to hear from you. If this Pull request is accepted , this would be my first git contribution. Have a nice day.
                                                     Thank you