Remove imu_listener node (#272)

* remove unused rmw_implementation dependency

* remove imu listener

* rclcpp is already a build and exec depend

* add missing rmw dependency

demo_nodes_cpp/CMakeLists.txt

@@ -16,7 +16,6 @@ find_package(example_interfaces REQUIRED)
 find_package(rclcpp REQUIRED)
 find_package(rcutils)
 find_package(rmw REQUIRED)
-find_package(sensor_msgs REQUIRED)
 find_package(std_msgs REQUIRED)
 
 function(custom_executable subfolder target)
@@ -34,9 +33,6 @@ endfunction()
 custom_executable(topics talker)
 custom_executable(topics listener)
 custom_executable(topics listener_best_effort)
-custom_executable(topics imu_listener)
-ament_target_dependencies(imu_listener
-  "sensor_msgs")
 custom_executable(topics allocator_tutorial)
 custom_executable(topics talker_serialized_message)
 custom_executable(topics listener_serialized_message)

demo_nodes_cpp/package.xml

@@ -14,25 +14,22 @@
   <build_depend>example_interfaces</build_depend>
   <build_depend>rclcpp</build_depend>
   <build_depend>rcutils</build_depend>
+  <build_depend>rmw</build_depend>
   <build_depend>rmw_implementation_cmake</build_depend>
-  <build_depend>sensor_msgs</build_depend>
   <build_depend>std_msgs</build_depend>
 
   <exec_depend>example_interfaces</exec_depend>
   <exec_depend>launch_ros</exec_depend>
   <exec_depend>rclcpp</exec_depend>
   <exec_depend>rcutils</exec_depend>
-  <exec_depend>rmw_implementation</exec_depend>
-  <exec_depend>sensor_msgs</exec_depend>
+  <exec_depend>rmw</exec_depend>
   <exec_depend>std_msgs</exec_depend>
 
   <test_depend>ament_cmake_pytest</test_depend>
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>ament_lint_common</test_depend>
   <test_depend>launch</test_depend>
   <test_depend>launch_testing</test_depend>
-  <test_depend>rclcpp</test_depend>
-  <test_depend>rmw_implementation</test_depend>
 
   <export>
     <build_type>ament_cmake</build_type>