How do I remove someones package when they touch a part?

function onTouch(Hit)
      if Hit.Parent:findFirstChild("Humanoid")  ~= nil then
            game.Players:GetPlayerFromCharacter(Hit.Parent)["insert 'package''s name 
here'"]:Destroy()
      end
end
local sp = script.Parent
sp.OnTouch:connect(onTouch)

if you're meaning the player's backpack, try only deleting it's children:

function deleteChildren(instanceClass)
      local children = instanceClass:GetChildren()
      for i = 1,#children do
            children[i]:Destroy()
      end
end