Remove the rules to generate the course since it has been removed from the repos

Makefile

@@ -6,16 +6,12 @@ INHERITANCE_GRAPHS = $(call graphs,classesTree exceptionsTree)
 IMPLEMENTATION_GRAPHS = $(call graphs,arrayList implementations linkedList newCellArrayList newCellLinkedList hashMap)
 BOX = $(call graphs,nestedBox)
 
-COURSE = IST-4-JAV_Course.pdf
 SLIDES = $(call pdfs,Slides)
 WORKSHEET = $(call pdfs,Worksheet)
 
 WEBPAGE = IST-4-JAV.html
 
-all: $(COURSE) $(SLIDES) $(WORKSHEET) $(WEBPAGE)
-
-$(COURSE): Course.md $(MODEL_PARALLELOGRAM)
-	pandoc --toc $< -o $@
+all: $(SLIDES) $(WORKSHEET) $(WEBPAGE)
 
 Slides/Class1.pdf: Slides/Class1.md $(MODEL_PARALLELOGRAM) figures/helloworld.tex
 	pandoc --slide-level=3 -t beamer $< -o $@
@@ -36,4 +32,4 @@ Worksheet/%.pdf: Worksheet/%.md
 	pandoc -s $< -o $@
 
 clean:
-	rm -f $(MODEL_PARALLELOGRAM) $(INHERITANCE_GRAPHS) $(COURSE) $(SLIDES)
+	rm -f $(MODEL_PARALLELOGRAM) $(INHERITANCE_GRAPHS) $(SLIDES)