diff --git a/Upgrade.lua b/Upgrade.lua
index a3da614..bd90b2c 100644
--- a/Upgrade.lua
+++ b/Upgrade.lua
@@ -5,8 +5,6 @@ local upgrade = {}
 local constants = require("libs/Constants")
 local chunkProcessor = require("libs/ChunkProcessor")
 local mapUtils = require("libs/MapUtils")
-local chunkPropertyUtils = require("libs/ChunkPropertyUtils")
-local baseUtils = require("libs/BaseUtils")
 local chunkUtils = require("libs/ChunkUtils")
 
 -- constants
@@ -31,12 +29,6 @@ local TRIPLE_CHUNK_SIZE = constants.TRIPLE_CHUNK_SIZE
 
 -- imported functions
 
-local getChunkById = mapUtils.getChunkById
-local setChunkBase = chunkPropertyUtils.setChunkBase
-
-local createBase = baseUtils.createBase
-local findNearbyBase = baseUtils.findNearbyBase
-
 local addBasesToAllEnemyStructures = chunkUtils.addBasesToAllEnemyStructures
 
 local sFind = string.find
diff --git a/libs/ChunkUtils.lua b/libs/ChunkUtils.lua
index 9c8d93f..352c3e1 100644
--- a/libs/ChunkUtils.lua
+++ b/libs/ChunkUtils.lua
@@ -537,7 +537,6 @@ function chunkUtils.unregisterEnemyBaseStructure(map, entity, damageType, skipCo
             removeFunc = removeTurretCount
         else
             hiveType = "biter-spawner"
-
             removeFunc = removeNestCount
         end
     end