removed duplicated previous_publish_timestamp_ increment by publish_p…

…eriod_ in diff_drive_controller.cpp (#644) (#777)

Co-authored-by: Jules CARPENTIER <jules.carpentier@capgemini.com>
(cherry picked from commit 77420cb)

Co-authored-by: julescarpentier <44528057+julescarpentier@users.noreply.github.com>

diff_drive_controller/src/diff_drive_controller.cpp

@@ -203,8 +203,6 @@ controller_interface::return_type DiffDriveController::update(
 
   if (should_publish)
   {
-    previous_publish_timestamp_ += publish_period_;
-
     if (realtime_odometry_publisher_->trylock())
     {
       auto & odometry_message = realtime_odometry_publisher_->msg_;