Investigate wether the hippo:authrole from hstconfig-domain.xml with empty hipposys:groups can be removed

From http://svn.onehippo.org/repos/hippo/hippo-cms7/site-toolkit/trunk/toolkit-resources/addon/repository/src/main/resources/hippo-configuration/hstconfig-domain.xml

does the part below add any thing? If not, let's remove it

<sv:node sv:name="hippo:authrole">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>hipposys:authrole</sv:value>
</sv:property>
<sv:property sv:name="hipposys:groups" sv:type="String" sv:multiple="true">
</sv:property>
<sv:property sv:name="hipposys:role" sv:type="String">
<sv:value>readonly</sv:value>
</sv:property>
</sv:node>