Remove links from Javadoc generation

javadoc.io website is down for now, and this makes
the build fail.

Author: acogoluegnes

pom.xml

@@ -369,8 +369,8 @@
           <additionalOptions>-Xdoclint:none</additionalOptions>
           <links>
             <link>https://netty.io/4.1/api/</link>
-            <link>https://www.javadoc.io/doc/io.dropwizard.metrics/metrics-core/${metrics.version}/</link>
-            <link>https://javadoc.io/doc/io.micrometer/micrometer-core/${micrometer.version}/</link>
+<!--            <link>https://www.javadoc.io/doc/io.dropwizard.metrics/metrics-core/${metrics.version}/</link>-->
+<!--            <link>https://javadoc.io/doc/io.micrometer/micrometer-core/${micrometer.version}/</link>-->
           </links>
         </configuration>
         <executions>