proc-base: remove doxygen stuff

Makefile

@@ -16,10 +16,7 @@ default:
 	@echo "       make default"
 	@echo "       make test"
 	@echo "       make install"
-	@echo "       make doc"
-	@echo "   Caution: make sure the tests, installation and documentation does not produce any error."
-	@echo "3. View the produced documentation, e.g."
-	@echo "       firefox doc/index.html"
+	@echo "   Caution: make sure the tests and installation does not produce any error."
 	@echo ""
 	@echo "**** How to build and run a lab? ****"
 	@echo "1. Change into the respective directory, e.g."
@@ -29,9 +26,6 @@ default:
 	@echo "   The resulting executable is located in the bin folder."
 	@echo "3. Build and run the tests, e.g."
 	@echo "       make test"
-	@echo "4. Build the HTML documentation from the sources, e.g."
-	@echo "       make doc"
-	@echo "   The produced HTML documentation is located in the doc folder. Open the index.html file in a HTML browser."
 	@echo "Notes:"
 	@echo "- You may cleanup the builds, e.g."
 	@echo "       make clean"