The Intel Software Improvement Program makes directory $HOME/intel on Linux.
There is really no reason to pollute the home directory like that. Linux has directories just for this purpose, such as these.
I have opted out of the program during installation, so I'm not sure why this directory even gets recreated when I delete it. Maybe that's another bug in itself.
There doesn't seem to be any data collected at least, as file size and timestamp of the files don't change.