You can clear this entry by removing the name from the below file.
File Location: C:\Users\username\.Commcell\CommcellList
The give below are the steps.
1) Open the above file named "CommcellList" using a notepad or any editor and then delete the line where this name is lying.
2) Save the file after making the above change.
3) Login again then verify the deleted name is appearing or not.