Remove release notes file.  Using github releases for this now.
Remove release notes file.  Using github releases for this now.

gigya/KafkaNetClient,EranOfer/KafkaNetClient,martijnhoekstra/kafka-net,bridgewell/kafka-net,CenturyLinkCloud/kafka-net,geffzhang/kafka-net,BDeus/KafkaNetClient,PKRoma/kafka-net,Jroland/kafka-net,nightkid1027/kafka-net