Yes, I do agrre with you.
There will not be any impact even after removing the command from CL.
And, When it comes to parameters for that command, it is not mandatory to have the parameters for OVRDBF command. So, it will not give any error.
Make sure that, You are removing corresponding DLTOVR command also.
But, in general we use parameters with this command for Overriding the actual DataBase file.
There will not be any impact of this command in progra. You can test the same by removing the same.