Revert " Added upstream command"

This reverts commit ffb7e9b.

Author: tanishagupta1

README.md

@@ -55,15 +55,10 @@ For the quick start, you can follow the steps below:
 1. Star <a href="https://github.com/utkarsh1504/DSA-Java" title="this">this</a> repository.
 2. Fork <a href="https://github.com/utkarsh1504/DSA-Java" title="this">this</a> repository.
 3. Clone the **forked** repository.
-4. Set <a href="https://github.com/utkarsh1504/DSA-Java" title="this">this</a> repository as upstream repository. 
 
 ```yml
 git clone https://github.com/<your-github-username>/DSA-Java
 ```
-Set upstream command
-```yml
-git remote add upstream https://github.com/Utkarsh1504/DSA-Java.git
-```
 
 3. Navigate to the project directory.