How to prevent srvctl start from making a copy of the listener.ora to listener.ora.bak?

I would like to stop the copying of the listener.ora file when srvctl start listener command is issued.  Using a symlink for the .ora files in a directory that doesn't get updated until patches are done.  When we reboot the host or run srvctl start listener then it will make a copy of the listener.ora file and create a new listener.ora file.

Thanks in advance.