Nope, sorry. If you want something from a web server, you'll have to send and receive http headers. However those are rather simple to make and remove from the output. Another way is using wget for example to download a file from a website without the hassle of scripting it in mIRC.
If the file you get from the web server is a regular text file you have what you wanted, if it's html you'll have to parse it yourself to remove all <tag> stuff.
You can also search google for something like 'remove html formatting'. One program i found (
http://www.protonfx.com/) should remove all html tags in a file, it has commandline so you can /run it. (
i haven't written or tested this program, but it seems to do what you want)