virsh: Fix the wrong doc for pool-list

The storage pool's management doesn't relate with a domain, it
probably was an intention, but not achieved yet. And the fact
is only active pools are listed by default.

tools/virsh.pod

@@ -2188,11 +2188,10 @@ Returns basic information about the I<pool> object.
 
 =item B<pool-list> [I<--inactive> | I<--all>] [I<--details>]
 
-List pool objects known to libvirt.  By default, only pools in use by
-active domains are listed; I<--inactive> lists just the inactive
-pools, and I<--all> lists all pools. The I<--details> option instructs
-virsh to additionally display pool persistence and capacity related
-information where available.
+List pool objects known to libvirt.  By default, only active pools
+are listed; I<--inactive> lists just the inactive pools, and I<--all>
+lists all pools. The I<--details> option instructs virsh to additionally
+display pool persistence and capacity related information where available.
 
 =item B<pool-name> I<uuid>