[virt] removing blank lines in attributes file

Author: ousleyp

modules/virt-document-attributes.adoc

@@ -12,11 +12,11 @@
 :VirtProductName: OpenShift Virtualization
 :ProductRelease:
 :ProductVersion:
-
+//
 :VirtVersion: 4.10
 :KubeVirtVersion: v0.49.0
 :HCOVersion: 4.10.0
-
+//
 // :LastHCOVersion:
 :product-build:
 :DownloadURL: registry.access.redhat.com
@@ -33,12 +33,12 @@
 :Install_BookName: Installing OpenShift Virtualization
 :Using_BookName: Using OpenShift Virtualization
 :RN_BookName: OpenShift Virtualization release notes
-
+//
 // OKD branding
 ifdef::openshift-origin[]
 :product-title: OKD
 :VirtProductName: OKD Virtualization
 :Install_BookName: Installing OKD Virtualization
 :Using_BookName: Using OKD Virtualization
 :RN_BookName: OKD Virtualization release notes
-endif::[]
+endif::[]