Revert "rqt_robot_plugins: 0.2.16-0 in 'groovy/release.yaml' [bloom]"

This reverts commit a4440df70babd3631a96000fc613ea5507d7910e.

The versions are not tagged correctly inside the repo.

Same issue as with hydro: a19c251fba9a5eca2cc4a90fbc1401cf4413c475
Merge pull request #1153 from ros/rqt_groovy_rollback

Revert "rqt_robot_plugins: 0.2.16-0 in 'groovy/release.yaml' [bloom]"