diff --git a/docs/TODO b/docs/TODO
index b4daabc..75eab51 100644
--- a/docs/TODO
+++ b/docs/TODO
@@ -15,7 +15,6 @@ If you see modifications to this file in git status, IGNORE them and do not comm
         a good discription nearby in the code.
         - could also try an alternative step method with error function
             eg) https://en.wikipedia.org/wiki/Runge%E2%80%93Kutta%E2%80%93Fehlberg_method
-    - remove simulation dependancy from physics.h
     - fix moon tests with SOI coordinate transforms for planets
     - remove bodies on non closed orbits after they are a certain distance from
         the root body, or bary-center