Drop explicit deps on perl(Sys::Virt) and perl(Win::Hivex).

Sys::Virt will be dropped in RHEL.  The question was why we have this
dependency, since the tools don't actually use Sys::Virt at all.
Therefore I dropped it from Fedora too.

perl(Win::Hivex) should be picked up by the automatic dep scripts.

libguestfs.spec

@@ -49,7 +49,7 @@ Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
 Version:       1.43.3
-Release:       3%{?dist}
+Release:       4%{?dist}
 License:       LGPLv2+
 
 # Build only for architectures that have a kernel
@@ -630,10 +630,6 @@ BuildArch:     noarch
 Requires:      %{name} = %{epoch}:%{version}-%{release}
 Requires:      %{name}-tools-c = %{epoch}:%{version}-%{release}
 
-# NB: Only list deps here which are not picked up automatically.
-Requires:      perl(Sys::Virt)
-Requires:      perl(Win::Hivex) >= 1.2.7
-
 
 %description tools
 This package contains miscellaneous system administrator command line
@@ -1369,6 +1365,9 @@ rm ocaml/html/.gitignore
 
 
 %changelog
+* Mon Jan 04 2021 Richard W.M. Jones <rjones@redhat.com> - 1:1.43.3-4
+- Drop explicit deps on perl(Sys::Virt) and perl(Win::Hivex).
+
 * Wed Dec 02 2020 Richard W.M. Jones <rjones@redhat.com> - 1:1.43.3-3
 - Unify Fedora and RHEL spec files.