Remove class name (#103)

Signed-off-by: Maurice-1235 <[email protected]>

nav2_gradient_costmap_plugin/gradient_layer.xml

@@ -1,5 +1,5 @@
 <library path="nav2_gradient_costmap_plugin_core">
-  <class name="nav2_gradient_costmap_plugin/GradientLayer" type="nav2_gradient_costmap_plugin::GradientLayer" base_class_type="nav2_costmap_2d::Layer">
+  <class type="nav2_gradient_costmap_plugin::GradientLayer" base_class_type="nav2_costmap_2d::Layer">
     <description>This is an example plugin which puts repeating costs gradients to costmap</description>
   </class>
 </library>

nav2_sms_behavior/behavior_plugin.xml

@@ -1,5 +1,5 @@
 <library path="nav2_sms_behavior_plugin">
-  <class name="nav2_sms_behavior/SendSms" type="nav2_sms_behavior::SendSms" base_class_type="nav2_core::Behavior">
+  <class type="nav2_sms_behavior::SendSms" base_class_type="nav2_core::Behavior">
     <description>This is an example plugin which produces an SMS text message behavior.</description>
   </class>
 </library>

nav2_straightline_planner/global_planner_plugin.xml

@@ -1,5 +1,5 @@
 <library path="nav2_straightline_planner_plugin">
-	<class name="nav2_straightline_planner/StraightLine" type="nav2_straightline_planner::StraightLine" base_class_type="nav2_core::GlobalPlanner">
+	<class type="nav2_straightline_planner::StraightLine" base_class_type="nav2_core::GlobalPlanner">
 	  <description>This is an example plugin which produces straight path.</description>
 	</class>
 </library>