Remove unused code from pit fights

src/004-base/basePitFight.js

src/facilities/pit/fights/0_lethalRandom.js

src/facilities/pit/fights/0_nonLethalRandom.js

src/facilities/pit/fights/1_lethalBodyguard.js

src/facilities/pit/fights/1_nonLethalBodyguard.js

src/facilities/pit/fights/2_lethalScheduledBG.js