don't commit generated license boiler plate comments

Author: bbottema

.circleci/config.yml

@@ -7,7 +7,7 @@ mvn-build-test-command: &mvn-build-test-command
   mvn-build-test-command: mvn verify -DexcludeLiveServerTests=true -Dmaven.javadoc.skip=true
 
 mvn-deploy-command: &mvn-deploy-command
-  mvn-deploy-command: mvn -s .circleci/maven-release-settings.xml clean deploy -DdeployAtEnd=true -DperformRelease=true -DskipTests -Dspotbugs.skip=true
+  mvn-deploy-command: mvn -s .circleci/maven-release-settings.xml clean deploy -DdeployAtEnd=true -DperformRelease=true -DskipTests -Dspotbugs.skip=true && mvn clean
   context: RELEASE_PROFILE_BBOTTEMA
 
 workflows: