Remove separate PDF documents builds config

Author: shorodilov

src/conf.py

@@ -76,11 +76,7 @@
 latex_engine = "xelatex"
 latex_documents = [
     (master_doc, latex_doc, project, authors, "manual", False),
-    ("appx/software_list", "Software.tex", project, authors, "howto", False),
-    ("appx/code_edit", "IDE.tex", project, authors, "howto", False),
-    ("appx/blog/spec", "DjangoBlog.tex", project, authors, "howto", False),
-    ("appx/assignments", "CreatingPullRequest.tex",
-     "Creating the Pull Request", authors, "howto", False),
+    # TODO: add separate documents to build
 ]
 latex_appendices = [
     # TODO: review appendices list