Interesting. I don’t have that file either, and find no mention of it in the library source. I also did a full rebuild of my project and see no reference to it in the compiler output. Where did you install the library from? I’m using a copy forked from the github repo. If I recall when I downloaded it the github version was more up to date than the Particle library.
EDIT: I see that the current Particle library and github versions are in sync. version 0.2.23