Remove v7 plugin since there is no test at the moment.
Remove v7 plugin since there is no test at the moment.

pluser/nikola_plugins,lotabout/plugins,lotabout/plugins,getnikola/plugins,s2hc-johan/plugins,pluser/nikola_plugins,getnikola/plugins,s2hc-johan/plugins,pluser/nikola_plugins,getnikola/plugins,lotabout/plugins,s2hc-johan/plugins