update local.conf sample to nuke unneccsary prefprov example
update local.conf sample to nuke unneccsary prefprov example

BKrev: 40a05a9eh0gzdGr5RpKWfbYxj-DnXw

buglabs/oe-buglabs,troth/oe-ts7xxx,YtvwlD/od-oe,troth/oe-ts7xxx,yyli/overo-oe,anguslees/openembedded-android,xifengchuo/openembedded,nzjrs/overo-openembedded,popazerty/openembedded-cuberevo,buglabs/oe-buglabs,sentient-energy/emsw-oe-mirror,sledz/oe,yyli/overo-oe,nx111/openembeded_openpli2.1_nx111,hulifox008/openembedded,sampov2/audio-openembedded,dellysunnymtech/sakoman-oe,yyli/overo-oe,sampov2/audio-openembedded,sampov2/audio-openembedded,openpli-arm/openembedded,JamesAng/oe,nx111/openembeded_openpli2.1_nx111,JamesAng/oe,giobauermeister/openembedded,sledz/oe,sentient-energy/emsw-oe-mirror,thebohemian/openembedded,crystalfontz/openembedded,xifengchuo/openembedded,philb/pbcl-oe-2010,mrchapp/arago-oe-dev,mrchapp/arago-oe-dev,John-NY/overo-oe,trini/openembedded,thebohemian/openembedded,buglabs/oe-buglabs,buglabs/oe-buglabs,demsey/openembedded,rascalmicro/openembedded-rascal,sampov2/audio-openembedded,dave-billin/overo-ui-moos-auv,KDAB/OpenEmbedded-Archos,John-NY/overo-oe,anguslees/openembedded-android,nvl1109/openembeded,popazerty/openembedded-cuberevo,libo/openembedded,sampov2/audio-openembedded,scottellis/overo-oe,SIFTeam/openembedded,popazerty/openembedded-cuberevo,mrchapp/arago-oe-dev,crystalfontz/openembedded,scottellis/overo-oe,nx111/openembeded_openpli2.1_nx111,trini/openembedded,dave-billin/overo-ui-moos-auv,JamesAng/goe,scottellis/overo-oe,demsey/openenigma2,anguslees/openembedded-android,KDAB/OpenEmbedded-Archos,rascalmicro/openembedded-rascal,libo/openembedded,crystalfontz/openembedded,nx111/openembeded_openpli2.1_nx111,scottellis/overo-oe,yyli/overo-oe,demsey/openenigma2,yyli/overo-oe,demsey/openembedded,sledz/oe,demsey/openembedded,nzjrs/overo-openembedded,KDAB/OpenEmbedded-Archos,nx111/openembeded_openpli2.1_nx111,libo/openembedded,buglabs/oe-buglabs,dellysunnymtech/sakoman-oe,popazerty/openembedded-cuberevo,YtvwlD/od-oe,bticino/openembedded,philb/pbcl-oe-2010,sentient-energy/emsw-oe-mirror,scottellis/overo-oe,openembedded/openembedded,JamesAng/oe,demsey/openembedded,JrCs/opendreambox,demsey/openenigma2,rascalmicro/openembedded-rascal,JrCs/opendreambox,thebohemian/openembedded,openpli-arm/openembedded,hulifox008/openembedded,sampov2/audio-openembedded,sledz/oe,JamesAng/oe,BlackPole/bp-openembedded,demsey/openenigma2,anguslees/openembedded-android,JamesAng/oe,YtvwlD/od-oe,sledz/oe,troth/oe-ts7xxx,Martix/Eonos,JrCs/opendreambox,popazerty/openembedded-cuberevo,openembedded/openembedded,openembedded/openembedded,openembedded/openembedded,giobauermeister/openembedded,JamesAng/goe,rascalmicro/openembedded-rascal,openembedded/openembedded,John-NY/overo-oe,crystalfontz/openembedded,nlebedenco/mini2440,hulifox008/openembedded,SIFTeam/openembedded,nvl1109/openembeded,bticino/openembedded,trini/openembedded,philb/pbcl-oe-2010,nx111/openembeded_openpli2.1_nx111,YtvwlD/od-oe,nlebedenco/mini2440,troth/oe-ts7xxx,philb/pbcl-oe-2010,crystalfontz/openembedded,philb/pbcl-oe-2010,nvl1109/openembeded,SIFTeam/openembedded,John-NY/overo-oe,yyli/overo-oe,bticino/openembedded,nvl1109/openembeded,mrchapp/arago-oe-dev,JrCs/opendreambox,popazerty/openembedded-cuberevo,Martix/Eonos,anguslees/openembedded-android,libo/openembedded,scottellis/overo-oe,JrCs/opendreambox,openembedded/openembedded,nzjrs/overo-openembedded,Martix/Eonos,giobauermeister/openembedded,giobauermeister/openembedded,nzjrs/overo-openembedded,nzjrs/overo-openembedded,YtvwlD/od-oe,yyli/overo-oe,nvl1109/openembeded,thebohemian/openembedded,BlackPole/bp-openembedded,sentient-energy/emsw-oe-mirror,dellysunnymtech/sakoman-oe,nlebedenco/mini2440,nlebedenco/mini2440,mrchapp/arago-oe-dev,anguslees/openembedded-android,rascalmicro/openembedded-rascal,JrCs/opendreambox,YtvwlD/od-oe,xifengchuo/openembedded,nvl1109/openembeded,dave-billin/overo-ui-moos-auv,openpli-arm/openembedded,Martix/Eonos,dellysunnymtech/sakoman-oe,troth/oe-ts7xxx,xifengchuo/openembedded,troth/oe-ts7xxx,Martix/Eonos,anguslees/openembedded-android,John-NY/overo-oe,SIFTeam/openembedded,nzjrs/overo-openembedded,dellysunnymtech/sakoman-oe,sentient-energy/emsw-oe-mirror,mrchapp/arago-oe-dev,yyli/overo-oe,thebohemian/openembedded,libo/openembedded,rascalmicro/openembedded-rascal,openpli-arm/openembedded,demsey/openenigma2,xifengchuo/openembedded,John-NY/overo-oe,openembedded/openembedded,nlebedenco/mini2440,thebohemian/openembedded,hulifox008/openembedded,YtvwlD/od-oe,thebohemian/openembedded,hulifox008/openembedded,sutajiokousagi/openembedded,openpli-arm/openembedded,JrCs/opendreambox,sledz/oe,dave-billin/overo-ui-moos-auv,JamesAng/goe,openembedded/openembedded,JamesAng/oe,buglabs/oe-buglabs,nzjrs/overo-openembedded,crystalfontz/openembedded,dave-billin/overo-ui-moos-auv,dave-billin/overo-ui-moos-auv,KDAB/OpenEmbedded-Archos,bticino/openembedded,SIFTeam/openembedded,popazerty/openembedded-cuberevo,dellysunnymtech/sakoman-oe,xifengchuo/openembedded,libo/openembedded,BlackPole/bp-openembedded,xifengchuo/openembedded,trini/openembedded,bticino/openembedded,sledz/oe,giobauermeister/openembedded,demsey/ope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