Comment out notebook 4 debugging entries

Comment out the first page and sections for notebook 4 debugging.

Author: SandraVerhagen

book/_toc.yml

@@ -42,10 +42,10 @@ parts:
         - file: exercise_notebooks/exercise_notebook_3_structures_loops.ipynb
         # - file: exercise_notebooks/exercise_notebook_3_loops_debugging.ipynb
 
-    - file: notebook_4_debugging/PythonNotebook4_first_page.ipynb
-      sections:
-        - file: notebook_4_debugging/PythonNotebook4_debugging.ipynb
-        - file: exercise_notebooks/exercise_notebook_4_debugging.ipynb
+  #  - file: notebook_4_debugging/PythonNotebook4_first_page.ipynb
+  #    sections:
+  #      - file: notebook_4_debugging/PythonNotebook4_debugging.ipynb
+  #      - file: exercise_notebooks/exercise_notebook_4_debugging.ipynb
 
     - file: notebook_5_figures/PythonNotebook5_first_page.ipynb
       sections: