Pick up maven-javadoc-plugin version from parent POM

Author: garydgregory

pom.xml

@@ -180,7 +180,6 @@
     <commons.spotbugs.version>4.7.3.0</commons.spotbugs.version>
     <commons.spotbugs.impl.version>4.7.3</commons.spotbugs.impl.version>
     <commons.japicmp.version>0.16.0</commons.japicmp.version>
-    <commons.javadoc.version>3.4.1</commons.javadoc.version>
     <commons.biz.aQute.bndlib.version>6.3.1</commons.biz.aQute.bndlib.version>
     <japicmp.skip>false</japicmp.skip>