I am learning the Any% NMG 1221 route, and have been making good progress. But the load remover doesn't seem to have a linux version or version for livesplit one. How should i go about removing the load times when timing my runs?

There is currently no officially-approved way to do this, so you'll have to submit real time. If you want to participate in testing of the potential future solution, join the Discord (linked at the top), find src-forum, and locate the post "Autosplitter ready for testing" from Alex Knauth.