Remove old copy of training slides

doc/How-To.md

@@ -2,7 +2,10 @@
 
 In this section of the IBEX User Manual, we describe how to do the most common and important tasks.
 
-We regularly run training sessions on IBEX. The slides from this course can be found {download}`here <how_to/IBEX_initial_training.pptx>`.
+We regularly run training sessions on IBEX. The slides from this course can be found at
+```
+\\isis.cclrc.ac.uk\shares\ISIS_Experiment_Controls_Public\training
+```
 
 ```{toctree}
 :maxdepth: 1

doc/scripting/training_course/genie_python-and-IBEX-(Introduction).rst

@@ -14,7 +14,7 @@ Welcome to this introductory course on ``genie_python``, a Python module that en
 
 At each stage, the course aims to assist learning with exercises and worked examples. We will assume a basic working knowledge of Python. If you've never programmed in Python before, we recommend the :external+mantid:ref:`introduction_to_python` from the Mantid project.
 
-The slides accompanying this course can be found :download:`here<genie_python_and_ibex.pptx>`
+The slides accompanying this course can be found at ``\\isis.cclrc.ac.uk\shares\ISIS_Experiment_Controls_Public\training``.
 
 ``genie_python`` does not cover data analysis. If you want to do analysis that can't be achieved with basic Python, we recommend the :external+mantid:ref:`Python in Mantid training course<pim_intro>`.