spec: Drop support for Fedora 27

In accordance with our platform support policy, now that
Fedora 29 is out we no longer support building on Fedora 27.

This allows us to remove a few version checks.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

libvirt.spec.in

@@ -4,7 +4,7 @@
 # that's still supported by the vendor. It may work on other distros
 # or versions, but no effort will be made to ensure that going forward.
 %define min_rhel 7
-%define min_fedora 27
+%define min_fedora 28
 
 %if (0%{?fedora} && 0%{?fedora} >= %{min_fedora}) || (0%{?rhel} && 0%{?rhel} >= %{min_rhel})
     %define supported_platform 1
@@ -72,7 +72,7 @@
 %endif
 
 # We need a recent enough libiscsi (>= 1.18.0)
-%if 0%{?fedora} >= 28 || 0%{?rhel} > 7
+%if 0%{?fedora} || 0%{?rhel} > 7
     %define with_storage_iscsi_direct 0%{!?_without_storage_iscsi_direct:1}
 %else
     %define with_storage_iscsi_direct 0
@@ -258,7 +258,7 @@ BuildRequires: /usr/bin/pod2man
 %endif
 BuildRequires: gcc
 BuildRequires: git
-%if 0%{?fedora} >= 27 || 0%{?rhel} > 7
+%if 0%{?fedora} || 0%{?rhel} > 7
 BuildRequires: perl-interpreter
 %else
 BuildRequires: perl
@@ -386,7 +386,7 @@ BuildRequires: wireshark-devel >= 2.1.0
 BuildRequires: libssh-devel >= 0.7.0
 %endif
 
-%if 0%{?fedora} > 27 || 0%{?rhel} > 7
+%if 0%{?fedora} || 0%{?rhel} > 7
 BuildRequires: rpcgen
 BuildRequires: libtirpc-devel
 %endif