Make a script that can delete a line in several files automatically

Hello Guys,

I need help creating something that could update more than 10000 files inside a folder... I need the following:

I have several files with diferente names but that ende with *.rcf (opens eith notepad) inside I have:

[Main]
SendStatusFile=YES
Log=YES
IniFile=*.INI
[Host]
HostName=200.99.137.234

I need to delete de following line:

IniFile=*.INI

(* This as several names)

In all files.....

Do you know how to do it?

Thanks