Revert "Add BC"

devTools/types/FC/RA.d.ts

js/003-data/gameVariableData.js

src/data/backwardsCompatibility/backwardsCompatibility.js

src/interaction/siRules.js

src/js/DefaultRules.js

src/js/assayJS.js

src/js/removeSlave.js

src/js/rulesAssistant.js

src/js/rulesAssistantOptions.js