Remove unused code

scripts/lua/modules/flow_dbms/drivers/mysql.lua

@@ -1,21 +0,0 @@
---
--- (C) 2021 - ntop.org
---
-
-local driver = {}
-
-function driver:new(options)
-  local obj = {}
-
-  setmetatable(obj, self)
-  self.__index = self
-  return obj
-end
-
-function driver:topk(ifid, what_k, filter)
-   local res = {}
-
-   return res
-end
-
-return driver

scripts/lua/modules/flow_dbms/drivers/nindex.lua

@@ -1,21 +0,0 @@
---
--- (C) 2021 - ntop.org
---
-
-local driver = {}
-function driver:new(options)
-  local obj = {}
-
-  setmetatable(obj, self)
-  self.__index = self
-
-  return obj
-end
-
-function driver:topk(ifid, what_k, filter)
-   local res = {}
-
-   return res
-end
-
-return driver

scripts/lua/modules/flow_dbms/flow_dbms.lua

@@ -1,50 +0,0 @@
---
--- (C) 2021 - ntop.org
---
-
-local dirs = ntop.getDirs()
-package.path = dirs.installdir .. "/scripts/lua/modules/flow_dbms/drivers/?.lua;" .. package.path
-local flow_dbms = {}
-local driver
-
-local available_tops = {"host", "src_host", "dst_host",
-			"port", "src_port", "dst_port",
-			"conversations"}
-
-local function checkTop(what_k)
-   for _, k in pairs(available_tops) do
-      if k == what_k then return true end
-   end
-
-   return false
-end
-
-function flow_dbms:new()
-   if ntop.getPrefs().is_dump_flows_to_mysql_enabled == true then
-      driver = require("mysql"):new()
-   else --[[ if nindex is enabled... --]]
-   end
-
-   local obj = {
-      driver = driver
-   }
-
-   setmetatable(obj, self)
-   self.__index = self
-
-   return obj
-end
-
-function flow_dbms:queryTopk(ifid, what_k, filter)
-   if not driver then
-      return {} -- TODO: handle error
-   end
-
-   if not checkTop(what_k) then
-      return {} -- TODO: handle error
-   end
-
-   return driver:topk(ifid, what_k, filter)
-end
-
-return flow_dbms