Clean up dependencies

src/lib.rs

@@ -1,11 +1,10 @@
 // https://github.com/lucasmaystre/kickscore/tree/master/kickscore
 
-mod condest;
-mod expm;
 mod fitter;
 mod item;
 pub mod kernel;
 mod linalg;
+mod math;
 mod model;
 pub mod observation;
 mod storage;