Remove unused code

lib/outlook/internal_tree.ex

@@ -10,11 +10,6 @@ defmodule Outlook.InternalTree do
     |> Html.to_html()
   end
 
-  def render_html_preview(tree, target \\ "1") do
-    tree
-    |> Html.to_html_preview(target)
-  end
-
   require Logger
   def apply_modifier(tree, modifier, nids, opts \\ %{}) do
     # Logger.info modifier

lib/outlook/internal_tree/html.ex

@@ -51,30 +51,6 @@ defmodule Outlook.InternalTree.Html do
 
   def to_html([]), do: ""
 
-  def to_html_preview([ %InternalNode{type: :element} = node | rest], target_id) do
-    attr_string = Map.put(node.attributes, :nid, node.nid)
-    |> Enum.map_join(" ", fn {k,v} -> "#{k}=\"#{v}\"" end)
-    "<#{node.name} #{attr_string}>" <>
-      to_html_preview(node.content, target_id) <>
-      "</#{node.name}>" <>
-      to_html_preview(rest, target_id)
-  end
-
-  def to_html_preview([ %InternalNode{type: :text} = node | rest], target_id) do
-    ~s(<span nid="#{node.nid}">#{node.content}</span>) <> to_html_preview(rest, target_id)
-  end
-
-  def to_html_preview([ %InternalNode{type: :comment} = node | rest], target_id) do
-    ~s(<span nid="#{node.nid}"><!--#{node.content}--></span>) <> to_html_preview(rest, target_id)
-  end
-
-  def to_html_preview([ %TranslationUnit{} = tunit | rest], target_id) do
-    ~s|<span class="tunit" nid="#{tunit.nid}" tu-status="#{tunit.status}" phx-click="select_current_tunit"
-       phx-value-nid="#{tunit.nid}" phx-target="#{target_id}">#{tunit.content}</span>| <> to_html_preview(rest, target_id)
-  end
-
-  def to_html_preview([], _target_id), do: ""
-
 
   def render_doc(tree) do
     OutlookWeb.HtmlDocComponent.render_doc(%{tree: tree})