Stop creating wrong devel manual pages

Devel manual pages install correct manual pages with 3.gz suffix. But
there are also additional links just with .gz suffix. They are created
only in spec file. I think they were needed before unbound contained
proper installation of manuals for development. It is missing .3 suffix.
But it is not necessary anymore, because such recipe already exists in
upstream Makefile.in.

Resolves: rhbz#2071943

unbound.spec

@@ -37,7 +37,7 @@
 Summary: Validating, recursive, and caching DNS(SEC) resolver
 Name: unbound
 Version: 1.13.1
-Release: 13%{?extra_version:.%{extra_version}}%{?dist}
+Release: 14%{?extra_version:.%{extra_version}}%{?dist}
 License: BSD
 Url: https://nlnetlabs.nl/projects/unbound/
 Source: https://nlnetlabs.nl/downloads/%{name}/%{name}-%{version}%{?extra_version}.tar.gz
@@ -315,12 +315,6 @@ rm %{buildroot}%{python2_sitearch}/*.la
 rm %{buildroot}%{python3_sitearch}/*.la
 %endif
 
-# create softlink for all functions of libunbound man pages
-for mpage in ub_ctx ub_result ub_ctx_create ub_ctx_delete ub_ctx_set_option ub_ctx_get_option ub_ctx_config ub_ctx_set_fwd ub_ctx_resolvconf ub_ctx_hosts ub_ctx_add_ta ub_ctx_add_ta_file ub_ctx_trustedkeys ub_ctx_debugout ub_ctx_debuglevel ub_ctx_async ub_poll ub_wait ub_fd ub_process ub_resolve ub_resolve_async ub_cancel ub_resolve_free ub_strerror ub_ctx_print_local_zones ub_ctx_zone_add ub_ctx_zone_remove ub_ctx_data_add ub_ctx_data_remove;
-do
-  echo ".so man3/libunbound.3" > %{buildroot}%{_mandir}/man3/$mpage ;
-done
-
 mkdir -p %{buildroot}%{_localstatedir}/run/unbound
 
 # Install directories for easier config file drop in
@@ -463,6 +457,9 @@ popd
 %attr(0644,root,root) %config %{_sysconfdir}/%{name}/root.key
 
 %changelog
+* Tue Apr 26 2022 Petr Menšík <pemensik@redhat.com> - 1.13.1-14
+- Stop creating wrong devel manual pages (#2071943)
+
 * Thu Mar 31 2022 Petr Menšík <pemensik@redhat.com> - 1.13.1-13
 - Disable SHA-1 support (#2070495)