Stop building PDF documentation

It brings too many dependencies, it's fragile and breaks way too often.

pungi.spec

@@ -2,7 +2,7 @@
 
 Name:           pungi
 Version:        4.2.3
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Distribution compose tool
 
 License:        GPLv2
@@ -36,15 +36,7 @@ BuildRequires:  python3-dogpile-cache
 BuildRequires:  python3-parameterized
 
 #deps for doc building
-BuildRequires:  python3-sphinx, texlive-collection-fontsrecommended
+BuildRequires:  python3-sphinx
-BuildRequires:  texlive-cmap, texlive-babel-english, texlive-fancyhdr
-BuildRequires:  texlive-titlesec, texlive-framed, texlive-threeparttable
-BuildRequires:  texlive-mdwtools, texlive-wrapfig, texlive-parskip, texlive-upquote
-BuildRequires:  texlive-multirow, texlive-capt-of, texlive-eqparbox
-BuildRequires:  tex(fncychap.sty)
-BuildRequires:  tex(tabulary.sty)
-BuildRequires:  tex(needspace.sty)
-BuildRequires:  latexmk
 
 Requires:       python3-kobo-rpmlib
 Requires:       python3-kickstart
@@ -98,7 +90,6 @@ no guarantees about API stability.
 %build
 %py3_build
 cd doc
-make latexpdf SPHINXBUILD=/usr/bin/sphinx-build-3
 make epub     SPHINXBUILD=/usr/bin/sphinx-build-3
 make text     SPHINXBUILD=/usr/bin/sphinx-build-3
 make man      SPHINXBUILD=/usr/bin/sphinx-build-3
@@ -118,7 +109,7 @@ nosetests-3 --exe
 %files
 %license COPYING GPL
 %doc AUTHORS
-%doc doc/_build/latex/Pungi.pdf doc/_build/epub/Pungi.epub doc/_build/text/*
+%doc doc/_build/epub/Pungi.epub doc/_build/text/*
 %{_bindir}/%{name}-koji
 %{_bindir}/%{name}-gather
 %{_bindir}/comps_filter
@@ -144,6 +135,9 @@ nosetests-3 --exe
 %{_bindir}/%{name}-wait-for-signed-ostree-handler
 
 %changelog
+* Thu Jun 11 2020 Lubomír Sedlář <lsedlar@redhat.com> - 4.2.3-2
+- Stop building PDF documentation
+
 * Thu Jun 11 2020 Lubomír Sedlář <lsedlar@redhat.com> - 4.2.3-1
 - Move test for unsigned packages with pkgset_koji_scratch_tasks to PkgsetPhase
   class. (jkaluza)