remove last page from toc

this is already include in kindle

internal/epub/core.go

@@ -234,7 +234,6 @@ func (e *ePub) Write() error {
 			{"OEBPS/nav.xhtml", e.render(navTmpl, map[string]any{
 				"Title": title,
 				"TOC":   string(toc),
-				"Last":  part.Images[len(part.Images)-1],
 			})},
 			{"OEBPS/Text/style.css", styleTmpl},
 			{"OEBPS/Text/part.xhtml", e.render(partTmpl, map[string]any{

internal/epub/templates/nav.xhtml.tmpl

@@ -9,9 +9,8 @@
     <nav epub:type="toc" id="toc">
       <h1>Table of content</h1>
       <ol>
-        <li><a href="Text/part.xhtml">Title</a></li>
+        <li><a href="Text/part.xhtml">{{ .Title }}</a></li>
 {{ .TOC }}
-        <li><a href="Text/{{ .Last.Id }}_p{{ .Last.Part}}.xhtml">Last page</a></li>
       </ol>
     </nav>
   </body>