Removed useless constructors

libuavcan_drivers/posix/include/uavcan_posix/dynamic_node_id_server/file_event_tracer.hpp

@@ -60,8 +60,6 @@ class FileEventTracer : public uavcan::dynamic_node_id_server::IEventTracer
     }
 
 public:
-    FileEventTracer() { }
-
     /**
      * Initializes the file based event tracer.
      */

libuavcan_drivers/posix/include/uavcan_posix/dynamic_node_id_server/file_storage_backend.hpp

@@ -87,8 +87,6 @@ class FileStorageBackend : public uavcan::dynamic_node_id_server::IStorageBacken
     }
 
 public:
-    FileStorageBackend() { }
-
     /**
      * Initializes the file based backend storage by passing a path to
      * the directory where the key named files will be stored.