Lua filter to remove captions from tables

[Stephan Boltzmann <stephan2boltzmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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Hello everybody out there using Pandoc,

I would like to remove the caption from tables in PDF output and tried a 
couple of things without success:

if FORMAT:match 'latex' then
  function Table (elem)
    --caption = elem.caption
    caption = elem.c[2] -- caption seems to be second element
    print(pandoc.utils.stringify(caption))
    --elem.c[2] =  nil
    --elem.c[2] =  pandoc.Str('Test')
    --elem.caption =  nil
    --elem = nil
    --return {pandoc.Table(elem.c)}
    --return {elem}
    --elem:remove(2)
    --table.remove(elem.c,2)
--[[
    return {
      pandoc.Para(pandoc.Str('test'))
    }
--]]
    return {
      --pandoc.Table(elem.caption, elem.aligns, elem.widths, elem.headers, 
elem.rows)
    }
  end
end

The main problem could actually rather be the construction of the table 
using the function pandoc.Table in the return statement:
Could not read list: Could not get Block value: expected table, got 'nil' 
(nil)

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