Remove references to appendix in Makefile

Makefile

@@ -45,14 +45,6 @@ chapter_deps:
 tilt.rs:
 	ln -s max-destabilizer-rank/tilt.rs/ tilt.rs
 
-blank-appendix:
-	rm appendix.tex || echo appendix non-existent
-	ln -s /dev/null appendix.tex
-
-nb-appendix:
-	rm appendix.tex || echo appendix non-existent
-	ln -s notebook-appendix.tex appendix.tex
-
 # TEX FILES FROM NOTEBOOKS
 
 define NOTEBOOK_TO_TEX_RULE
@@ -86,7 +78,7 @@ $(foreach _base, $(RUSTBASENAMES), $(eval $(call RUST_TO_TEX_RULE, $(_base))))
 
 rust_tex: $(addsuffix .tex, $(RUSTBASENAMES))
 
-pretex: chapter_deps ${PREAMBLEFILES} tilt.rs nb-appendix notebook_tex
+pretex: chapter_deps ${PREAMBLEFILES} tilt.rs notebook_tex
 
 .PHONY: clean
 clean: