[Travis] Disable documentation cache
[Travis] Disable documentation cache

Since documentation is build only while it was changed, caching, that may
cause some serious issues while building (hiding previous warnings,
not regenerating the root toctree), is disabled as it will no longer
affect the performance of non-documentation builds.

vihuvac/Sylius,inssein/Sylius,juramy/Sylius,gruberro/Sylius,Niiko/Sylius,Lowlo/Sylius,ReissClothing/Sylius,gmoigneu/platformsh-integrations,gruberro/Sylius,videni/Sylius,DorianCMore/Sylius,SyliusBot/Sylius,DorianCMore/Sylius,vihuvac/Sylius,axelvnk/Sylius,regnisolbap/Sylius,cdaguerre/Sylius,juramy/Sylius,gmoigneu/platformsh-integrations,antonioperic/Sylius,CoderMaggie/Sylius,michalmarcinkowski/Sylius,MichaelKubovic/Sylius,gseidel/Sylius,ylastapis/Sylius,Lowlo/Sylius,cdaguerre/Sylius,foobarflies/Sylius,pamil/Sylius,TeamNovatek/Sylius,gabiudrescu/Sylius,axelvnk/Sylius,Brille24/Sylius,psren/Sylius,pjedrzejewski/Sylius,tuka217/Sylius,CoderMaggie/Sylius,Ejobs/Sylius,patrick-mcdougle/Sylius,lchrusciel/Sylius,videni/Sylius,nakashu/Sylius,psyray/Sylius,gruberro/Sylius,NeverResponse/Sylius,ezecosystem/Sylius,antonioperic/Sylius,loic425/Sylius,danut007ro/Sylius,pamil/Sylius,polisys/Sylius,gseidel/Sylius,jvahldick/Sylius,gseidel/Sylius,cdaguerre/Sylius,vihuvac/Sylius,ReissClothing/Sylius,loic425/Sylius,nakashu/Sylius,polisys/Sylius,gmoigneu/platformsh-integrations,Joypricecorp/Sylius,psren/Sylius,mheki/Sylius,Joypricecorp/Sylius,bitbager/Sylius,Mozan/Sylius,venyii/Sylius,bitbager/Sylius,psren/Sylius,sweoggy/Sylius,venyii/Sylius,davalb/Sylius,TeamNovatek/Sylius,psyray/Sylius,Brille24/Sylius,Brille24/Sylius,Rvanlaak/Sylius,Brille24/Sylius,psren/Sylius,kayue/Sylius,danut007ro/Sylius,ReissClothing/Sylius,ezecosystem/Sylius,itinance/Sylius,PyRowMan/Sylius,davalb/Sylius,itinance/Sylius,ktzouno/Sylius,okwinza/Sylius,davalb/Sylius,mheki/Sylius,TheMadeleine/Sylius,Mozan/Sylius,Sylius/Sylius,pjedrzejewski/Sylius,patrick-mcdougle/Sylius,foobarflies/Sylius,regnisolbap/Sylius,jjanvier/Sylius,sweoggy/Sylius,steffenbrem/Sylius,jvahldick/Sylius,diimpp/Sylius,Ejobs/Sylius,PyRowMan/Sylius,PyRowMan/Sylius,SyliusBot/Sylius,bretto36/Sylius,ylastapis/Sylius,michalmarcinkowski/Sylius,steffenbrem/Sylius,steffenbrem/Sylius,davalb/Sylius,itinance/Sylius,polisys/Sylius,Pitoune/Sylius,diimpp/Sylius,torinaki/Sylius,mkilmanas/Sylius,bitbager/Sylius,NeverResponse/Sylius,Mozan/Sylius,kayue/Sylius,axelvnk/Sylius,Pitoune/Sylius,coudenysj/Sylius,sweoggy/Sylius,juramy/Sylius,mbabker/Sylius,lchrusciel/Sylius,juramy/Sylius,polisys/Sylius,lchrusciel/Sylius,ReissClothing/Sylius,jvahldick/Sylius,gorkalaucirica/Sylius,Zales0123/Sylius,michalmarcinkowski/Sylius,bretto36/Sylius,gseidel/Sylius,pjedrzejewski/Sylius,okwinza/Sylius,mkilmanas/Sylius,Rvanlaak/Sylius,MichaelKubovic/Sylius,michalmarcinkowski/Sylius,Lowlo/Sylius,TeamNovatek/Sylius,steffenbrem/Sylius,bretto36/Sylius,steffenbrem/Sylius,itinance/Sylius,TheMadeleine/Sylius,polisys/Sylius,bretto36/Sylius,tuka217/Sylius,mheki/Sylius,Pitoune/Sylius,Niiko/Sylius,coudenysj/Sylius,GSadee/Sylius,coudenysj/Sylius,kayue/Sylius,Arminek/Sylius,inssein/Sylius,davalb/Sylius,GSadee/Sylius,tuka217/Sylius,pjedrzejewski/Sylius,venyii/Sylius,videni/Sylius,loic425/Sylius,nakashu/Sylius,gabiudrescu/Sylius,Niiko/Sylius,ktzouno/Sylius,Zales0123/Sylius,regnisolbap/Sylius,MichaelKubovic/Sylius,antonioperic/Sylius,ylastapis/Sylius,gmoigneu/platformsh-integrations,Niiko/Sylius,psyray/Sylius,vihuvac/Sylius,axelvnk/Sylius,juramy/Sylius,dragosprotung/Sylius,SyliusBot/Sylius,Arminek/Sylius,mbabker/Sylius,Ejobs/Sylius,Zales0123/Sylius,patrick-mcdougle/Sylius,101medialab/Sylius,Arminek/Sylius,jjanvier/Sylius,DorianCMore/Sylius,inssein/Sylius,diimpp/Sylius,tuka217/Sylius,GSadee/Sylius,TheMadeleine/Sylius,foobarflies/Sylius,TeamNovatek/Sylius,okwinza/Sylius,CoderMaggie/Sylius,jjanvier/Sylius,Joypricecorp/Sylius,ezecosystem/Sylius,coudenysj/Sylius,Mozan/Sylius,Pitoune/Sylius,ylastapis/Sylius,CoderMaggie/Sylius,foobarflies/Sylius,cdaguerre/Sylius,danut007ro/Sylius,jjanvier/Sylius,psyray/Sylius,jjanvier/Sylius,nakashu/Sylius,Sylius/Sylius,gorkalaucirica/Sylius,gorkalaucirica/Sylius,jvahldick/Sylius,PyRowMan/Sylius,101medialab/Sylius,TeamNovatek/Sylius,patrick-mcdougle/Sylius,ktzouno/Sylius,Lowlo/Sylius,torinaki/Sylius,ktzouno/Sylius,Joypricecorp/Sylius,MichaelKubovic/Sylius,Ejobs/Sylius,pamil/Sylius,mkilmanas/Sylius,coudenysj/Sylius,Sylius/Sylius,regnisolbap/Sylius,TheMadeleine/Sylius,gabiudrescu/Sylius,mbabker/Sylius,Rvanlaak/Sylius,gruberro/Sylius,mheki/Sylius,venyii/Sylius,gabiudrescu/Sylius,okwinza/Sylius,DorianCMore/Sylius,dragosprotung/Sylius,NeverResponse/Sylius,okwinza/Sylius,ezecosystem/Sylius,torinaki/Sylius,axelvnk/Sylius,NeverResponse/Sylius,Rvanlaak/Sylius,cdaguerre/Sylius,psyray/Sylius,gorkalaucirica/Sylius,dragosprotung/Sylius,Rvanlaak/Sylius,Ejobs/Sylius,101medialab/Sylius,torinaki/Sylius,mbabker/Sylius,patrick-mcdougle/Sylius,bitbager/Sylius,dragosprotung/Sylius,Mozan/Sylius,tuka217/Sylius,ReissClothing/Sylius,videni/Sylius,inssein/Sylius,danut007ro/Sylius,mkilmanas/Sylius,sweoggy/Sylius