Don't add json-io library to build.properties
Don't add json-io library to build.properties

The library is already included since it is part of the `target/lib`
folder.

sschaef/scala-ide,sschaef/scala-ide,dragos/scala-ide,mlangc/scala-ide,stephenh/scala-ide,wpopielarski/scala-ide,scala-ide/scala-ide,scala-ide/scala-ide,dragos/scala-ide,mlangc/scala-ide,andrey-ilinykh/scala-ide,dragos/scala-ide,andrey-ilinykh/scala-ide,stephenh/scala-ide,sschaef/scala-ide,dragos/scala-ide,scala-ide/scala-ide,wpopielarski/scala-ide,andrey-ilinykh/scala-ide,wpopielarski/scala-ide,stephenh/scala-ide,scala-ide/scala-ide,andrey-ilinykh/scala-ide,stephenh/scala-ide,mlangc/scala-ide,wpopielarski/scala-ide,mlangc/scala-ide,sschaef/scala-ide