remove unused RSUM test implementation

...ain/java/ttc2019/metamodels/create/BddCreationHelper.java

...ain/java/ttc2019/metamodels/create/BdtCreationHelper.java

...c/main/java/ttc2019/metamodels/create/CreateTTinJava.java

.../src/main/java/ttc2019/metamodels/create/LoadEObject.java

...main/java/ttc2019/metamodels/create/TtCreationHelper.java

solutions/RSync/src/main/scala/sum/bdd/Assignment.scala

...ync/src/main/scala/sum/bdd/AssignmentPortOutputPort.scala

solutions/RSync/src/main/scala/sum/bdd/BDD.scala

solutions/RSync/src/main/scala/sum/bdd/BDDPortsPort.scala

solutions/RSync/src/main/scala/sum/bdd/BDDTreeTree.scala

solutions/RSync/src/main/scala/sum/bdd/HelperPort.scala

solutions/RSync/src/main/scala/sum/bdd/HelperTree.scala

solutions/RSync/src/main/scala/sum/bdd/InputPort.scala

solutions/RSync/src/main/scala/sum/bdd/Leaf.scala

...nc/src/main/scala/sum/bdd/LeafAssignmentsAssignment.scala

solutions/RSync/src/main/scala/sum/bdd/OutputPort.scala

solutions/RSync/src/main/scala/sum/bdd/Port.scala

solutions/RSync/src/main/scala/sum/bdd/Subtree.scala

...s/RSync/src/main/scala/sum/bdd/SubtreePortInputPort.scala

.../RSync/src/main/scala/sum/bdd/SubtreeTreeForOneTree.scala