Remove reference to defunct Customizer from v3
Remove reference to defunct Customizer from v3

[ci skip]

urbit/bootstrap,TheFridayInstitute/bootstrap,frostbitten/bootstrap,wesamco/bootstrap-rtl,blockstack/blockstack-bootstrap,david-schopf/bootstrap,IdanCo/bootstrap,onenameio/rhythm-bootstrap,mpharrigan/bootstrap,janseliger/bootstrap,vsn4ik/bootstrap,Scoutski/bootstrap,edanbarak/bootstrap,n054/bootstrap,GerHobbelt/bootstrap,nice-fungal/bootstrap,bardiharborow/bootstrap,slavanga/bootstrap,SweetProcess/bootstrap,edanbarak/bootstrap,NCARB/bootstrap,m5o/bootstrap,onenameio/rhythm-bootstrap,lipis/bootstrap,vsn4ik/bootstrap,fschumann1211/bootstrap,vitaligent/4,Scoutski/bootstrap,johnajacob/bootstrap,copperdesign/bootstrap,edanbarak/bootstrap,9-chirno/chirno,afuno/bootstrap,igoynawamreh/bootstrap,gijsbotje/bootstrap,johnajacob/bootstrap,yuyokk/bootstrap,igoynawamreh/bootstrap,xt0rted/bootstrap,tibo66/bootstrap,copperdesign/bootstrap,stanwmusic/bootstrap,inway/bootstrap,creativewebjp/bootstrap,tjkohli/bootstrap,stanwmusic/bootstrap,seanwu99/bootstrap,igoynawamreh/bootstrap,frostbitten/bootstrap,frostbitten/bootstrap,wesamco/bootstrap-rtl,afuno/bootstrap,9-chirno/chirno,Hemphill/bootstrap-docs,bardiharborow/bootstrap,m5o/bootstrap,janseliger/bootstrap,abvalentine/bootstrap,tagliala/bootstrap,andresgalante/bootstrap,tagliala/bootstrap,vsn4ik/bootstrap,Delagen/bootstrap,peterblazejewicz/bootstrap,lemuelbarango/bootstrap,peterblazejewicz/bootstrap,tomlutzenberger/bootstrap,Lyricalz/bootstrap,stanwmusic/bootstrap,bootstrapbrasil/bootstrap,9-chirno/chirno,xt0rted/bootstrap,SweetProcess/bootstrap,coliff/bootstrap,creativewebjp/bootstrap,inway/bootstrap,johnajacob/bootstrap,Hightrack/bootstrap,TheFridayInstitute/bootstrap,zalog/bootstrap,seanwu99/bootstrap,Lyricalz/bootstrap,jipexu/bootstrap,davethegr8/bootstrap,vitaligent/4,twbs/bootstrap,jipexu/bootstrap,Hightrack/bootstrap,xt0rted/bootstrap,lemuelbarango/bootstrap,yuyokk/bootstrap,Hemphill/bootstrap-docs,TheFridayInstitute/bootstrap,kvlsrg/bootstrap,tjkohli/bootstrap,Delagen/bootstrap,kvlsrg/bootstrap,inway/bootstrap,creativewebjp/bootstrap,realcrowd/bootstrap,bootstrapbrasil/bootstrap,creativewebjp/bootstrap,yuyokk/bootstrap,igoynawamreh/bootstrap,9-chirno/chirno,gijsbotje/bootstrap,joblocal/bootstrap,tibo66/bootstrap,TheFridayInstitute/bootstrap,n054/bootstrap,tomlutzenberger/bootstrap,joblocal/bootstrap,bardiharborow/bootstrap,lipis/bootstrap,hebbet/bootstrap,afuno/bootstrap,lipis/bootstrap,afuno/bootstrap,bardiharborow/bootstrap,vitaligent/4,onenameio/rhythm-bootstrap,realcrowd/bootstrap,hebbet/bootstrap,davethegr8/bootstrap,supergibbs/bootstrap,hellonewman81/bs4,andresgalante/bootstrap,hebbet/bootstrap,davethegr8/bootstrap,SweetProcess/bootstrap,tagliala/bootstrap,Delagen/bootstrap,blockstack/blockstack-bootstrap,n054/bootstrap,andresgalante/bootstrap,supergibbs/bootstrap,NCARB/bootstrap,sealocal/bootstrap,SweetProcess/bootstrap,JumpLinkNetwork/bootstrap-backward,frostbitten/bootstrap,stanwmusic/bootstrap,mpharrigan/bootstrap,hellonewman81/bs4,GerHobbelt/bootstrap,realcrowd/bootstrap,Scoutski/bootstrap,wesamco/bootstrap-rtl,abvalentine/bootstrap,kvlsrg/bootstrap,Delagen/bootstrap,lipis/bootstrap,hellonewman81/bs4,yuyokk/bootstrap,fschumann1211/bootstrap,slavanga/bootstrap,IdanCo/bootstrap,Lyricalz/bootstrap,Hightrack/bootstrap,sealocal/bootstrap,nice-fungal/bootstrap,twbs/bootstrap,seanwu99/bootstrap,Hemphill/bootstrap-docs,jipexu/bootstrap,nice-fungal/bootstrap,hebbet/bootstrap,joblocal/bootstrap,abvalentine/bootstrap,joblocal/bootstrap,zalog/bootstrap,zalog/bootstrap,peterblazejewicz/bootstrap,supergibbs/bootstrap,GerHobbelt/bootstrap,Lyricalz/bootstrap,mpharrigan/bootstrap,slavanga/bootstrap,slavanga/bootstrap,edanbarak/bootstrap,janseliger/bootstrap,tibo66/bootstrap,JumpLinkNetwork/bootstrap-backward,abvalentine/bootstrap,IdanCo/bootstrap,vsn4ik/bootstrap,IdanCo/bootstrap,copperdesign/bootstrap,david-schopf/bootstrap,seanwu99/bootstrap,fschumann1211/bootstrap,gijsbotje/bootstrap,david-schopf/bootstrap,jipexu/bootstrap,bootstrapbrasil/bootstrap,coliff/bootstrap,NCARB/bootstrap,andresgalante/bootstrap,Scoutski/bootstrap,n054/bootstrap,fschumann1211/bootstrap,JumpLinkNetwork/bootstrap-backward,wesamco/bootstrap-rtl,urbit/bootstrap,blockstack/blockstack-bootstrap,davethegr8/bootstrap,NCARB/bootstrap,sealocal/bootstrap,JumpLinkNetwork/bootstrap-backward,janseliger/bootstrap,gijsbotje/bootstrap,lemuelbarango/bootstrap,urbit/bootstrap,Hemphill/bootstrap-docs,realcrowd/bootstrap,lemuelbarango/bootstrap,johnajacob/bootstrap,supergibbs/bootstrap,copperdesign/bootstrap,tibo66/bootstrap,xt0rted/bootstrap,tomlutzenberger/bootstrap,sealocal/bootstrap