====== despawnItemByObjid ======

  * Parameters and types:
    * objid: numberobject objID
  * Return value and type:
     * code: numberSuccess (ErrorCode.OK) ErrorCode
  * The main purpose of this method: Remove props (by ID)
  * The specific use cases are as follows:

<code>
--Whenever a player makes an animated expression, remove a certain drop within 10 blocks around the host
--Execute this function when the player makes an animated expression
local function Player_PlayAction(event)
--Get the coordinates of the host
local result,x,y,z=Player:getPosition(0)
--Get the number and list of drops within 10 blocks around the host
local result2,num,list=World:getActorsByBox(3,x-10,y-10,z-10,x+10,y+10,z+10)
if num>0 then--If there is a drop
--Remove the first group of items
World:despawnItemByObjid(list[1])
--Display in chat box
Chat:sendSystemMsg("Dropped items found in the nearby 10 grids, one group has been removed")
else--If there is no drop
--Display in chat box
Chat:sendSystemMsg("No dropped items found in the nearby 10 grids!")
end
end
--Register animation expression listener, execute the above function when the player makes an animation expression
ScriptSupportEvent:registerEvent([=[Player.PlayAction]=],Player_PlayAction)
</code>