Hi Rohan,
If you delete the redefinition of a method but can not see it deleted, it is always better to re-open the component workbench (bsp_wd_cmpwb). If even that doesnt work, you may try logging out and logging in again.
What might have happened:
You might have opened the implementation class and then opened the context class by forward navigation. If you reach your redefined method this way and delete the redefinition and then go back, you wont see the redefinition deleted. Just re-open the component workbench and it will show up expected things. Had you deleted the method redefinition directly by right clicking and deleting the redefinition, this wouldn't have occurred.