libsamplerate: residual build files at fork repository

Hey freebsd community,

I have been keeping a fork mirror of freebsd-src for a bit of time and I
have dedicated a /dev branch in case I was interested in base system
development. Long story short, my merges from my main to dev branch
generated some residual header and source code files from a libsamplerate
library. I am unsure how that happened.

Looks like it was merged to source tree about 5 months ago. Does anyone by
chance know why this is. My main (mirrored to source tree) does not have
these generated residual builds.

development branch or freebsd-src mirror
https://github.com/rcghpge/freebsd/tree/dev

Kind regards,
Robert