node: check for available providers before unlinking
node: check for available providers before unlinking

fixes #413

xscharlie/satellizer,bnicart/satellizer,xxryan1234/satellizer,david300/satellizer,shubham13jain/satellizer,Manumental32/satellizer,redwood-strategic/satellizer,xxryan1234/satellizer,manojpm/satellizer,jonbgallant/satellizer,m-kostira/satellizer,marceldiass/satellizer,johan--/satellizer,jskrzypek/satellizer,thandaanda/satellizer,jskrzypek/satellizer,sahat/satellizer,jskrzypek/satellizer,gshireesh/satellizer,redwood-strategic/satellizer,gshireesh/satellizer,ABPFrameWorkGroup/satellizer,marfarma/satellizer,xxryan1234/satellizer,david300/satellizer,expertmaksud/satellizer,bartekmis/satellizer,johan--/satellizer,suratpyari/satellizer,vebin/satellizer,ezzaouia/satellizer,eduardomb/satellizer,TheOneTheOnlyDavidBrown/satellizer,david300/satellizer,eduardomb/satellizer,romcyncynatus/satellizer,xxryan1234/satellizer,romcyncynatus/satellizer,redwood-strategic/satellizer,thiagofesta/satellizer,david300/satellizer,eduardomb/satellizer,zawmyolatt/satellizer,eduardomb/satellizer,redwood-strategic/satellizer,xxryan1234/satellizer,gshireesh/satellizer,jskrzypek/satellizer,redwood-strategic/satellizer,gshireesh/satellizer,raycoding/satellizer,redwood-strategic/satellizer,xxryan1234/satellizer,baratheraja/satellizer,david300/satellizer,david300/satellizer,jskrzypek/satellizer,gshireesh/satellizer,gshireesh/satellizer,gshireesh/satellizer,redwood-strategic/satellizer,david300/satellizer,redwood-strategic/satellizer,memezilla/satellizer,SkydiverFL/satellizer,eduardomb/satellizer,eduardomb/satellizer,jayzeng/satellizer,heinbez/satellizer,gregoriusxu/satellizer,jskrzypek/satellizer,jskrzypek/satellizer,xxryan1234/satellizer,sahat/satellizer,redwood-strategic/satellizer,18098924759/satellizer,jskrzypek/satellizer,eduardomb/satellizer,gshireesh/satellizer,dgoguerra/satellizer,xxryan1234/satellizer,david300/satellizer,eduardomb/satellizer,themifycloud/satellizer,shikhardb/satellizer,jskrzypek/satellizer,viniciusferreira/satellizer,andyskw/satellizer,xxryan1234/satellizer,gshireesh/satellizer,jianwang195823/satellizer,eduardomb/satellizer,rick4470/satellizer,AmreeshTyagi/satellizer,IRlyDontKnow/satellizer,burasu/satellizer,david300/satellizer,elanperach/satellizer