Remove the last remaining support for "experimental" features.
Remove the last remaining support for "experimental" features.

This code has not been used for quite a while.

szeged/servo,szeged/servo,KiChjang/servo,emilio/servo,nnethercote/servo,canaltinova/servo,dati91/servo,larsbergstrom/servo,thiagopnts/servo,peterjoel/servo,thiagopnts/servo,mattnenterprise/servo,eddyb/servo,larsbergstrom/servo,upsuper/servo,DominoTree/servo,peterjoel/servo,szeged/servo,paulrouget/servo,KiChjang/servo,cbrewster/servo,canaltinova/servo,SimonSapin/servo,canaltinova/servo,splav/servo,szeged/servo,CJ8664/servo,pyfisch/servo,saneyuki/servo,thiagopnts/servo,paulrouget/servo,jimberlage/servo,anthgur/servo,mbrubeck/servo,cbrewster/servo,paulrouget/servo,splav/servo,splav/servo,eddyb/servo,CJ8664/servo,larsbergstrom/servo,notriddle/servo,rnestler/servo,pyfisch/servo,KiChjang/servo,KiChjang/servo,pyfisch/servo,mattnenterprise/servo,dsandeephegde/servo,DominoTree/servo,rnestler/servo,canaltinova/servo,mbrubeck/servo,larsbergstrom/servo,anthgur/servo,avadacatavra/servo,avadacatavra/servo,nnethercote/servo,DominoTree/servo,nrc/servo,saneyuki/servo,jimberlage/servo,CJ8664/servo,thiagopnts/servo,peterjoel/servo,CJ8664/servo,nnethercote/servo,rnestler/servo,ConnorGBrewster/servo,jimberlage/servo,upsuper/servo,nnethercote/servo,upsuper/servo,SimonSapin/servo,SimonSapin/servo,dati91/servo,sadmansk/servo,saneyuki/servo,splav/servo,dati91/servo,anthgur/servo,dsandeephegde/servo,ConnorGBrewster/servo,mbrubeck/servo,DominoTree/servo,jimberlage/servo,rnestler/servo,emilio/servo,KiChjang/servo,saneyuki/servo,mattnenterprise/servo,eddyb/servo,cbrewster/servo,szeged/servo,larsbergstrom/servo,dsandeephegde/servo,canaltinova/servo,emilio/servo,ConnorGBrewster/servo,notriddle/servo,avadacatavra/servo,rnestler/servo,nrc/servo,peterjoel/servo,anthgur/servo,peterjoel/servo,eddyb/servo,anthgur/servo,KiChjang/servo,sadmansk/servo,eddyb/servo,nrc/servo,mattnenterprise/servo,CJ8664/servo,KiChjang/servo,eddyb/servo,peterjoel/servo,larsbergstrom/servo,peterjoel/servo,canaltinova/servo,ConnorGBrewster/servo,mattnenterprise/servo,rnestler/servo,dati91/servo,peterjoel/servo,CJ8664/servo,emilio/servo,saneyuki/servo,ConnorGBrewster/servo,saneyuki/servo,fiji-flo/servo,pyfisch/servo,thiagopnts/servo,dati91/servo,canaltinova/servo,canaltinova/servo,DominoTree/servo,pyfisch/servo,notriddle/servo,paulrouget/servo,szeged/servo,sadmansk/servo,mbrubeck/servo,rnestler/servo,pyfisch/servo,sadmansk/servo,DominoTree/servo,mbrubeck/servo,pyfisch/servo,SimonSapin/servo,nnethercote/servo,avadacatavra/servo,paulrouget/servo,emilio/servo,dsandeephegde/servo,mattnenterprise/servo,notriddle/servo,mattnenterprise/servo,mbrubeck/servo,dsandeephegde/servo,eddyb/servo,paulrouget/servo,avadacatavra/servo,larsbergstrom/servo,fiji-flo/servo,upsuper/servo,fiji-flo/servo,notriddle/servo,anthgur/servo,larsbergstrom/servo,KiChjang/servo,SimonSapin/servo,dati91/servo,cbrewster/servo,cbrewster/servo,sadmansk/servo,paulrouget/servo,emilio/servo,upsuper/servo,avadacatavra/servo,upsuper/servo,emilio/servo,jimberlage/servo,anthgur/servo,szeged/servo,nnethercote/servo,splav/servo,DominoTree/servo,mbrubeck/servo,sadmansk/servo,szeged/servo,paulrouget/servo,fiji-flo/servo,dati91/servo,ConnorGBrewster/servo,splav/servo,nrc/servo,upsuper/servo,thiagopnts/servo,saneyuki/servo,mbrubeck/servo,sadmansk/servo,notriddle/servo,dsandeephegde/servo,avadacatavra/servo,szeged/servo,paulrouget/servo,CJ8664/servo,anthgur/servo,DominoTree/servo,saneyuki/servo,fiji-flo/servo,nrc/servo,nnethercote/servo,emilio/servo,szeged/servo,nnethercote/servo,KiChjang/servo,thiagopnts/servo,thiagopnts/servo,SimonSapin/servo,dsandeephegde/servo,pyfisch/servo,notriddle/servo,saneyuki/servo,nnethercote/servo,saneyuki/servo,SimonSapin/servo,SimonSapin/servo,fiji-flo/servo,nrc/servo,jimberlage/servo,ConnorGBrewster/servo,pyfisch/servo,cbrewster/servo,pyfisch/servo,notriddle/servo,CJ8664/servo,splav/servo,avadacatavra/servo,mattnenterprise/servo,DominoTree/servo,larsbergstrom/servo,rnestler/servo,splav/servo,nnethercote/servo,peterjoel/servo,splav/servo,cbrewster/servo,dati91/servo,fiji-flo/servo,splav/servo,ConnorGBrewster/servo,paulrouget/servo,upsuper/servo,jimberlage/servo,larsbergstrom/servo,KiChjang/servo,dsandeephegde/servo,eddyb/servo,notriddle/servo,emilio/servo,emilio/servo,jimberlage/servo,peterjoel/servo,jimberlage/servo,notriddle/servo,cbrewster/servo,fiji-flo/servo,nrc/servo,DominoTree/servo,sadmansk/servo