get rid of asciidoctor submodule

Author: hjwp

.gitmodules

@@ -73,12 +73,6 @@
 [submodule "tests/testrepo"]
     path = tests/testrepo
     url = [email protected]:hjwp/booktesttestrepo.git
-[submodule "asciidoc/asciidoctor"]
-	path = asciidoc/asciidoctor
-	url = https://github.com/asciidoctor/asciidoctor.git
-[submodule "asciidoc/asciidoctor-htmlbook"]
-	path = asciidoc/asciidoctor-htmlbook
-	url = https://github.com/oreillymedia/asciidoctor-htmlbook.git
 [submodule "source/appendix_VI_rest_api_backend/superlists"]
 	path = source/appendix_rest_api/superlists
 	url = [email protected]:hjwp/book-example.git

Makefile

@@ -5,7 +5,6 @@ HTML_PAGES := $(patsubst %.asciidoc, %.html, ${SOURCES})
 TESTS := $(patsubst %.asciidoc, test_%, ${SOURCES})
 
 RUN_ASCIIDOCTOR = asciidoctor -a source-highlighter=pygments -a pygments-style=default -a stylesheet=asciidoctor.css -a linkcss -a icons=font -a compat-mode -a '!example-caption' -a last-update-label='License: Creative Commons <a href="https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode">CC-BY-NC-ND</a>. Last updated:'
-RUN_OREILLY_FLAVOURED_ASCIIDOCTOR = ./asciidoc/asciidoctor/bin/asciidoctor -v --trace -d book --safe -b htmlbook --template-dir ./asciidoc/asciidoctor-htmlbook/htmlbook 
 
 export PYTHONHASHSEED = 0
 export PYTHONDONTWRITEBYTECODE = 1
@@ -29,10 +28,6 @@ part%.forbook.asciidoc: part%.asciidoc
 
 
 
-.PHONY: oreilly.%.asciidoc
-oreilly.%.asciidoc: %.asciidoc
-	$(RUN_OREILLY_FLAVOURED_ASCIIDOCTOR) $(subst oreilly.,,$@)
-
 book.html: part1.forbook.asciidoc
 book.html: part2.forbook.asciidoc
 book.html: part3.forbook.asciidoc