refactor: remove unused update functions and variables

ticketmachine.lua

@@ -655,32 +655,7 @@ local function clickSound() end
 -- ###########################
 -- Background Tasks
 -- ###########################
-local function getLastUpdateVersion()
-  if not fs.exists(".last_update_version") then return nil end
-  local f = fs.open(".last_update_version", "r")
-  if not f then return nil end
-  local v = f.readAll()
-  f.close()
-  return v
-end
 
-local function setLastUpdateVersion(v)
-  local f = fs.open(".last_update_version", "w")
-  if f then f.write(tostring(v)); f.close() end
-end
-
-local function runSilentMachineUpdate()
-  if not fs.exists('update_machine.lua') then
-    return false, "update_machine.lua not found"
-  end
-  local baseEnv = (getfenv and getfenv()) or _ENV or _G
-  local env = setmetatable({ AUTO_UPDATE_SILENT = true }, { __index = baseEnv })
-  local fn, err = loadfile('update_machine.lua', env)
-  if not fn then return false, err end
-  local ok, res = pcall(fn, '--silent')
-  if not ok then return false, tostring(res) end
-  return true, true
-end
 
 local lastUpdateError = nil