Remove documentation make scripts (#322)

Author: folmos-at-orange

doc/Makefile

@@ -29,7 +29,7 @@ Khiops Python library.
 ./create-doc -d -t
 
 # To only execute Sphinx on updated reST resources
-# make html
+# sphinx-build -M html . _build/
 ```
 
 ## Sphinx

doc/README.md

@@ -75,7 +75,7 @@ parse_commandline "$@"
 rm -v core/generated/*.rst
 rm -v sklearn/generated/*.rst
 rm -v internal/generated/*.rst
-make clean
+sphinx-build -M clean . _build
 
 if [[ $_arg_clean_tutorial == "on" ]]
 then

doc/clean-doc

@@ -106,4 +106,4 @@ cd "../.."
 
 # Create the documentation with Sphinx
 echo "Executing Sphinx"
-make html
+sphinx-build -M html . _build/