update `pandoc` data dir

pandoc/sitemap.lua

@@ -50,22 +50,6 @@ local function reverse (t)
   return t
 end
 
-local function find_free_col(wing, a, b)
-  local col = 1
-  while true do
-    for i=a,b do
-      local cell = wing[i][col]
-      if cell ~= nil and cell ~= L.X then
-        goto continue
-      end
-    end
-    do return col end
-    ::continue::
-    col = col + 1
-  end
-  return col
-end
-
 for _,node in ipairs(node_list) do
   local a_node = node_map[node]
   for _,node in ipairs(a_node["nodes"]) do