Phase out sympy and scipy

[lukew3]

Sympy and scipy are large and can result in generators requiring more code and longer loading times than are necessary. We should aim to replace the few scipy and sympy function calls in our own python so that the package can become lighter.

[Pranavtejar]

what does the sympy and scipy packages do?

[Pranavtejar]

and also let me know where and how you have used these packages