Rewrite fibonacci.py

[tianyizheng02]

There is a lot of bloat in this file that needs to be cleaned up (empty and unused classes, unnecessary helper functions, inefficient code, etc.)

[Varun270]

@tianyizheng02 Yeah I agree. So you want a simple straightforward solution of the Fibonacci series with DP right?

[tianyizheng02]

No, the original file just had comparisons of different methods of calculating the Fibonacci sequence (iterative and Binet's formula), so those methods just need to be rewritten and cleaned up

[saurabhraj042]

@tianyizheng02 Can I work on this ?

[johmn123-wq]

Kindly assign this task to me.