なにかパッケージを消した後colcon buildしたときに出てくるwarning解消法
Warning
[0.289s] WARNING:colcon.colcon_ros.prefix_path.ament:The path '/home/you/test_ws/install/package' in the environment variable AMENT_PREFIX_PATH doesn't exist
[0.289s] WARNING:colcon.colcon_ros.prefix_path.ament:The path '/home/you/test_ws/install/package' in the environment variable AMENT_PREFIX_PATH doesn't exist
解消法
unset AMENT_PREFIX_PATH
unset CMAKE_PREFIX_PATH