Duplicated definition of kie-pmml feature

There are two definitions of the same feature "kie-pmml" in features file [1]. These definitions are identical, so I think one of them can be easily removed.

[1] https://github.com/kiegroup/droolsjbpm-integration/blob/master/kie-osgi/kie-karaf-features/src/main/filtered-resources/repository/features.xml#L169