small chunkticker code cleanup

eco-core/core-plugin/src/main/kotlin/com/willfp/ecobosses/bosses/LivingEcoBoss.kt

@@ -46,8 +46,6 @@ class LivingEcoBoss(
         ticker.cancel()
         entity.remove()
         tickers.forEach { it.onDeath(this, currentTick) }
-        forceLoadedChunks.forEach { it.isForceLoaded = false }
-        forceLoadedChunks.clear()
 
         boss.markDead(mob.uniqueId)
     }

eco-core/core-plugin/src/main/kotlin/com/willfp/ecobosses/tick/ChunkTicker.kt

@@ -18,4 +18,9 @@ class ChunkTicker : BossTicker {
         currentChunk.isForceLoaded = true
         boss.forceLoadedChunks.add(currentChunk)
     }
+
+    override fun onDeath(boss: LivingEcoBoss, tick: Int) {
+        boss.forceLoadedChunks.forEach { it.isForceLoaded = false }
+        boss.forceLoadedChunks.clear()
+    }
 }