rpm: remove karaf plugin
rpm: remove karaf plugin

Apache Karaf is not yet available on Fedora.

Related to: #1554

sehrope/pgjdbc,jorsol/pgjdbc,sehrope/pgjdbc,jorsol/pgjdbc,sehrope/pgjdbc,marschall/pgjdbc,pgjdbc/pgjdbc,AlexElin/pgjdbc,marschall/pgjdbc,davecramer/pgjdbc,AlexElin/pgjdbc,AlexElin/pgjdbc,davecramer/pgjdbc,davecramer/pgjdbc,davecramer/pgjdbc,sehrope/pgjdbc,jorsol/pgjdbc,jorsol/pgjdbc,pgjdbc/pgjdbc,pgjdbc/pgjdbc,marschall/pgjdbc,marschall/pgjdbc,pgjdbc/pgjdbc