Remove superfluous buil requirements

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-epubmerge?expand=0&rev=2

python-epubmerge.spec

@@ -1,5 +1,5 @@
 #
-# spec file for package python-fanficfare
+# spec file for package python-epubmerge
 #
 # Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
 #
@@ -28,11 +28,9 @@ License:        GPL-3.0-only
 Group:          Development/Languages/Python
 URL:            https://github.com/JimmXinu/EpubMerge
 Source:         https://github.com/JimmXinu/EpubMerge/archive/v%{version}.tar.gz
-BuildRequires:  python2
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
-Requires(post): update-alternatives
-Requires(postun): update-alternatives
+BuildRequires:  python2
 BuildArch:      noarch
 %python_subpackages