Revert "Try running core specs on appveyor."
Revert "Try running core specs on appveyor."

This reverts commit 1c01d05440e42c84c300a80066c126ae03f0effa.

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