remove statuscodes from toctree

Author: reint-fischer

docs/user_guide/index.md

@@ -45,7 +45,6 @@ examples/tutorial_delaystart.ipynb
 :titlesonly:
 
 examples/explanation_kernelloop.md
-examples/tutorial_statuscodes.md
 examples/tutorial_sampling.ipynb
 examples/tutorial_gsw_density.ipynb
 examples/tutorial_Argofloats.ipynb