:green_heart: Avoid resetting atom.grammars
:green_heart: Avoid resetting atom.grammars

...because it messes up subsequent tests that hit code paths that make use of
atom.grammars.

/cc: @nathansobo @maxbrunsfeld

decaffeinate-examples/atom,FIT-CSE2410-A-Bombs/atom,Mokolea/atom,helber/atom,gontadu/atom,me-benni/atom,chfritz/atom,AlexxNica/atom,FIT-CSE2410-A-Bombs/atom,bj7/atom,brumm/atom,bolinfest/atom,florianb/atom,transcranial/atom,scippio/atom,alexandergmann/atom,ardeshirj/atom,johnhaley81/atom,tjkr/atom,liuderchi/atom,svanharmelen/atom,Austen-G/BlockBuilder,alfredxing/atom,AlexxNica/atom,alexandergmann/atom,PKRoma/atom,johnhaley81/atom,florianb/atom,decaffeinate-examples/atom,alfredxing/atom,Huaraz2/atom,alexandergmann/atom,sotayamashita/atom,gontadu/atom,xream/atom,ashneo76/atom,AdrianVovk/substance-ide,rlugojr/atom,AdrianVovk/substance-ide,rlugojr/atom,PKRoma/atom,hellendag/atom,sotayamashita/atom,florianb/atom,xream/atom,florianb/atom,kevinrenaers/atom,kevinrenaers/atom,decaffeinate-examples/atom,jordanbtucker/atom,Locke23rus/atom,CraZySacX/atom,dijs/atom,liuderchi/atom,transcranial/atom,stinsonga/atom,CraZySacX/atom,kaicataldo/atom,stinsonga/atom,Arcanemagus/atom,transcranial/atom,ashneo76/atom,Locke23rus/atom,kandros/atom,ashneo76/atom,PKRoma/atom,andrewleverette/atom,alfredxing/atom,svanharmelen/atom,stinsonga/atom,lpommers/atom,atom/atom,Austen-G/BlockBuilder,lpommers/atom,seedtigo/atom,stinsonga/atom,andrewleverette/atom,yamhon/atom,Ingramz/atom,brettle/atom,ykeisuke/atom,Huaraz2/atom,atom/atom,liuderchi/atom,gontadu/atom,andrewleverette/atom,bsmr-x-script/atom,Austen-G/BlockBuilder,wiggzz/atom,gzzhanghao/atom,jordanbtucker/atom,rlugojr/atom,seedtigo/atom,brettle/atom,CraZySacX/atom,helber/atom,Klozz/atom,ardeshirj/atom,bj7/atom,Arcanemagus/atom,daxlab/atom,brumm/atom,kandros/atom,me-benni/atom,daxlab/atom,dijs/atom,atom/atom,ykeisuke/atom,bj7/atom,tjkr/atom,wiggzz/atom,kaicataldo/atom,lpommers/atom,kaicataldo/atom,AdrianVovk/substance-ide,Ingramz/atom,bolinfest/atom,hellendag/atom,Mokolea/atom,hellendag/atom,ykeisuke/atom,t9md/atom,Locke23rus/atom,liuderchi/atom,efatsi/atom,ardeshirj/atom,me-benni/atom,Austen-G/BlockBuilder,seedtigo/atom,chfritz/atom,FIT-CSE2410-A-Bombs/atom,scippio/atom,Austen-G/BlockBuilder,Ingramz/atom,Klozz/atom,brumm/atom,chfritz/atom,Austen-G/BlockBuilder,xream/atom,scippio/atom,svanharmelen/atom,kevinrenaers/atom,Mokolea/atom,gzzhanghao/atom,decaffeinate-examples/atom,kandros/atom,wiggzz/atom,florianb/atom,jordanbtucker/atom,t9md/atom,efatsi/atom,gzzhanghao/atom,yamhon/atom,johnhaley81/atom,bolinfest/atom,dijs/atom,tjkr/atom,Huaraz2/atom,bsmr-x-script/atom,efatsi/atom,t9md/atom,AlexxNica/atom,Arcanemagus/atom,yamhon/atom,helber/atom,bsmr-x-script/atom,Klozz/atom,sotayamashita/atom,brettle/atom,daxlab/atom