Is there a MIME type assigned to a simple Unix configuration file type?

When I check with file <unix>.conf, it tells me ASCII text (text/plain as an actual MIME type), which is correct, but I was wondering whether there was a MIME type defined for a simple Unix like configuration with just variable names, an equal sign, and a value:

path=/usr/share/my-prog
temp=/tmp
...

Maybe something to do with having a shell script (since loading such a file would work in a shell script too.)

I know of the IANA list, although I could not really find anything that matches with what I'm asking.