Remove redundant serendipity_editor.js references.

Since we're now including serendipity_editor.js in the index.tpl,
there's no need to load it in the body in various .tpl files any
longer.

templates/2k11/admin/entries.tpl

@@ -2,7 +2,6 @@
 {* jQuery: No *}
 
 <script src="serendipity_define.js.php"></script>
-<script src="{serendipity_getFile file='admin/serendipity_editor.js'}"></script>
 
 <h2>{if $entry_vars.entry.title}{$entry_vars.entry.title|@escape|string_format:"{$CONST.EDIT_THIS_CAT}"}{else}{$CONST.NEW_ENTRY}{/if}</h2>
 {if $entry_vars.errMsg}