Remove unused /user/getting_started_completed route
Remove unused /user/getting_started_completed route

The used one is /getting_started_completed

closes #7164

KentShikama/diaspora,despora/diaspora,Amadren/diaspora,jhass/diaspora,Amadren/diaspora,Flaburgan/diaspora,despora/diaspora,diaspora/diaspora,KentShikama/diaspora,spixi/diaspora,SuperTux88/diaspora,Amadren/diaspora,SuperTux88/diaspora,SuperTux88/diaspora,despora/diaspora,jhass/diaspora,diaspora/diaspora,geraspora/diaspora,geraspora/diaspora,despora/diaspora,Flaburgan/diaspora,spixi/diaspora,KentShikama/diaspora,jhass/diaspora,jhass/diaspora,Flaburgan/diaspora,spixi/diaspora,Flaburgan/diaspora,geraspora/diaspora,Amadren/diaspora,diaspora/diaspora,diaspora/diaspora,spixi/diaspora,geraspora/diaspora,SuperTux88/diaspora,KentShikama/diaspora