No, do not delete the file at all.
If you want another solution, do this:
1) Login as other user.
2) Su to root and copy the files you want from the old user account to the new user account.
3) use rmuser or the control panel to completely remove the old user's home and subdirectories. Don't forget item 2) above before you do such.
4) Recreate the user.
5) Import the files to the recreated user's profile and use
chown <$NEW-OLD_USER> <$FILE>
to allow the recreated user to access.
6) Use KDM or GDM to set the user's preferred GUI.