Fixing an Asciidoctor error for Velero plug-in content

Author: pneedle-rh

backup_and_restore/application_backup_and_restore/oadp-features-plugins.adoc

@@ -11,7 +11,7 @@ OpenShift API for Data Protection (OADP) features provide options for backing up
 The default plug-ins enable Velero to integrate with certain cloud providers and to back up and restore {product-title} resources.
 
 include::modules/oadp-features.adoc[leveloffset=+1]
-include::modules/oadp-plugins.adoc[leveloffset=+1
+include::modules/oadp-plugins.adoc[leveloffset=+1]
 include::modules/oadp-configuring-velero-plugins.adoc[leveloffset=+1]
 
 [id="oadp-support-for-ibm-power-systems-and-ibm-z"]

modules/oadp-plugins.adoc

@@ -3,7 +3,6 @@
 // * backup_and_restore/application_backup_and_restore/oadp-features-plugins.adoc
 
 :_content-type: CONCEPT
-include::_attributes/common-attributes.adoc[]
 [id="oadp-plugins_{context}"]
 = OADP plug-ins