Final Commit for Doubly Linked List

[abhishek-07]

Please make sure you have done the following:

• [x] Created a folder with the name of language you code inside /Day<n>/ directory (Where n is for nth day)
• [x] Added your Codes
• [x] Tested your codes
• [x] Added credits (author and date) at the top of the code
• [x] Updated README.md
• [x] Added yourself as a contributor using all-conributors-cli

[Razdeep]

You did a good job. But you replaced someone else's source code(@imkaka). I would suggest you make a separate source code file for your code and restore the @imkaka's source.