[ARCHETYPE-563] use inherited plexus-component-metadata

which has fix for reproducible builds
diff --git a/pom.xml b/pom.xml
index 0fca0a8..e72cec7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -290,11 +290,6 @@
           <artifactId>maven-jetty-plugin</artifactId>
           <version>6.1.6</version>
         </plugin>
-        <plugin><!-- TODO remove when upgrading parent to 31 -->
-          <groupId>org.codehaus.plexus</groupId>
-          <artifactId>plexus-component-metadata</artifactId>
-          <version>1.7</version>
-        </plugin>
       </plugins>
     </pluginManagement>
     <plugins>