Remove build status section from README.md
Remove build status section from README.md

jsk_apc release is dropped via
https://github.com/ros/rosdistro/pull/17334 and https://github.com/ros/rosdistro/pull/17351

Related to https://github.com/start-jsk/jsk_apc/issues/2629

pazeshun/jsk_apc,pazeshun/jsk_apc,pazeshun/jsk_apc,pazeshun/jsk_apc,pazeshun/jsk_apc