<?xml version="1.0" encoding="UTF-8"?>
<feature-group-spec name="io" xmlns="urn:jboss:galleon:feature-group:1.0">
    <feature spec="subsystem.io">
        <param name="extension" value="org.wildfly.extension.io"/>
        <param name="subsystem" value="io"/>
        <feature spec="subsystem.io.buffer-pool">
	    <param name="buffer-pool" value="default"/>
        </feature>
        <feature spec="subsystem.io.worker">
	    <param name="worker" value="default"/>
        </feature>
    </feature>
</feature-group-spec>

<?xml version="1.0" encoding="UTF-8"?>
<feature-group-spec name="io" xmlns="urn:jboss:galleon:feature-group:1.0">
    <feature spec="subsystem.io">
        <param name="extension" value="org.wildfly.extension.io"/>
        <param name="subsystem" value="io"/>
        <feature spec="subsystem.io.worker">
	    <param name="worker" value="default"/>
        </feature>
    </feature>
</feature-group-spec>

Update BufferPool to use Undertow's
[WFLY-16711] Update BufferPool to use Undertow's

Remove declaration of buffer-pool
