Revert "gnu: libvirt: Support ZFS."

This reverts commit 61ccd756e5.

gnu/packages/virtualization.scm

@@ -60,7 +60,6 @@
   #:use-module (gnu packages docbook)
   #:use-module (gnu packages documentation)
   #:use-module (gnu packages figlet)
-  #:use-module (gnu packages file-systems)
   #:use-module (gnu packages firmware)
   #:use-module (gnu packages flex)
   #:use-module (gnu packages fontutils)
@@ -1145,8 +1144,7 @@ It started as a side project of LXC but can be used by any run-time.")
        ("ebtables" ,ebtables)
        ("parted" ,parted)
        ("iproute" ,iproute)
-       ("iptables" ,iptables)
-       ("zfs" ,zfs)))
+       ("iptables" ,iptables)))
     (native-inputs
      `(("bash-completion" ,bash-completion)
        ("gettext" ,gettext-minimal)