Hi Rohan,
Open the implementation class using SE24 and perform syntax check. You are most likely to see some syntax errors. Try to remove those errors.
At the same time you can open the class using SE24 and click on find and put the attribute name in search. You will get to see all crap that is present in that class related to that attribute. Make sure you delete/comment everything that you do not want in that class related to that attribute. Ensure no syntax error in class.
Now open your business component using component workbench and it will all be fine.