refactor: remove dead code

Author: hoelger

fed/mosaic-cell/src/main/java/org/eclipse/mosaic/fed/cell/ambassador/CellAmbassador.java

@@ -421,13 +421,9 @@ private void process(CellularCommunicationConfiguration interaction) throws Inte
             } else if (registeredServers.containsKey(nodeId)) { // handle servers (nodes in Internet, w/o radio region)
                 handleServerCellConfiguration(nodeId, cellConfiguration, interactionTime);
             } else {
-                if (cellConfiguration.isEnabled()) {
-                    throw new InternalFederateException(
-                            "Cell Ambassador: Cannot activate Cell module for \"" + nodeId + "\" because the id is unknown"
-                    );
-                } else {
-                    log.debug("Tried to deactivate the Cell module for a node with the unknown id: {}", nodeId);
-                }
+                throw new InternalFederateException(
+                    "Cell Ambassador: Cannot activate Cell module for \"" + nodeId + "\" because the id is unknown"
+                );
             }
         } else {
             if (isVehicle) {