remove unused boost dependencies (#468)

Author: Aposhian

package.xml

@@ -21,7 +21,7 @@
   <depend condition="$ROS_VERSION == 2">rclcpp</depend>
   <depend condition="$ROS_VERSION == 2">ament_index_cpp</depend>
 
-  <depend>boost</depend>
+  <build_depend>libboost-dev</build_depend>
   <depend>libzmq3-dev</depend>
   <depend>libncurses-dev</depend>