Remove unused Core Team Project Management labels
Remove unused Core Team Project Management labels

Some Core Team labels aren't used anymore. To prevent misleading our
users, we are removing these labels from the CONTRIBUTING document.

jordanbtucker/atom,helber/atom,stinsonga/atom,brettle/atom,kevinrenaers/atom,scippio/atom,bolinfest/atom,Arcanemagus/atom,bsmr-x-script/atom,daxlab/atom,liuderchi/atom,Austen-G/BlockBuilder,tjkr/atom,ardeshirj/atom,Arcanemagus/atom,rlugojr/atom,rlugojr/atom,ashneo76/atom,t9md/atom,Mokolea/atom,Austen-G/BlockBuilder,andrewleverette/atom,andrewleverette/atom,bj7/atom,scippio/atom,bolinfest/atom,florianb/atom,liuderchi/atom,helber/atom,ashneo76/atom,hellendag/atom,daxlab/atom,johnhaley81/atom,liuderchi/atom,daxlab/atom,atom/atom,andrewleverette/atom,decaffeinate-examples/atom,johnhaley81/atom,AlexxNica/atom,Mokolea/atom,florianb/atom,t9md/atom,bsmr-x-script/atom,CraZySacX/atom,brumm/atom,Mokolea/atom,jordanbtucker/atom,xream/atom,Austen-G/BlockBuilder,PKRoma/atom,hellendag/atom,tjkr/atom,florianb/atom,decaffeinate-examples/atom,liuderchi/atom,AdrianVovk/substance-ide,kevinrenaers/atom,gontadu/atom,stinsonga/atom,Ingramz/atom,Austen-G/BlockBuilder,Arcanemagus/atom,wiggzz/atom,sotayamashita/atom,bsmr-x-script/atom,me-benni/atom,bolinfest/atom,kevinrenaers/atom,atom/atom,brettle/atom,bj7/atom,helber/atom,brettle/atom,ardeshirj/atom,bj7/atom,AlexxNica/atom,FIT-CSE2410-A-Bombs/atom,hellendag/atom,Ingramz/atom,FIT-CSE2410-A-Bombs/atom,stinsonga/atom,sotayamashita/atom,jordanbtucker/atom,PKRoma/atom,decaffeinate-examples/atom,xream/atom,gontadu/atom,ardeshirj/atom,AlexxNica/atom,AdrianVovk/substance-ide,scippio/atom,sotayamashita/atom,florianb/atom,Austen-G/BlockBuilder,brumm/atom,wiggzz/atom,ashneo76/atom,gontadu/atom,wiggzz/atom,CraZySacX/atom,tjkr/atom,FIT-CSE2410-A-Bombs/atom,AdrianVovk/substance-ide,atom/atom,Austen-G/BlockBuilder,me-benni/atom,brumm/atom,t9md/atom,PKRoma/atom,stinsonga/atom,Ingramz/atom,rlugojr/atom,xream/atom,decaffeinate-examples/atom,CraZySacX/atom,florianb/atom,me-benni/atom,johnhaley81/atom