diff --git a/Makefile b/Makefile
index 90cefa23e..ea15b4b95 100644
--- a/Makefile
+++ b/Makefile
@@ -112,26 +112,6 @@ htmlhelp: deps
 	@echo "Build finished; now you can run HTML Help Workshop with the" \
 	      ".hhp project file in $(BUILDDIR)/htmlhelp."
 
-.PHONY: qthelp
-qthelp: deps
-	cd $(DOCS_DIR) && $(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
-	@echo
-	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
-	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
-	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/MasteringPlone.qhcp"
-	@echo "To view the help file:"
-	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/MasteringPlone.qhc"
-
-.PHONY: devhelp
-devhelp: deps
-	cd $(DOCS_DIR) && $(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
-	@echo
-	@echo "Build finished."
-	@echo "To view the help file:"
-	@echo "# mkdir -p $$HOME/.local/share/devhelp/MasteringPlone"
-	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/MasteringPlone"
-	@echo "# devhelp"
-
 .PHONY: epub
 epub: deps
 	cd $(DOCS_DIR) && $(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub