ve.ui.MWSaveDialog: Remove meta element filtering from wikitext preview

Once upon a time, we added code to filter <style> and <link> elements
from the rendering of templates in visual editor, because attempting
to cut them would crash Chrome (T52043).

There are at least three reasons why that is not needed here:
* The preview is not editable text, so you can't cut from it
* The Chrome bug was fixed 7 years ago anyway
* We now use TemplateStyles in articles and they work just fine

The code was added here in 9dd638a5ab
without explanation, I think it was just done for consistency.

Bug: T212085
Change-Id: I0712e3a081f04d0b74cda47652fa6eb118dfe7b2

modules/ve-mw/ui/dialogs/ve.ui.MWSaveDialog.js

@@ -198,7 +198,7 @@ ve.ui.MWSaveDialog.prototype.setDiffAndReview = function ( wikitextDiffPromise,
  * @param {HTMLDocument} [baseDoc] Base document against which to normalise links, if document provided
  */
 ve.ui.MWSaveDialog.prototype.showPreview = function ( docOrMsg, baseDoc ) {
-	var body, contents, $heading, redirectMeta, deferred,
+	var body, $heading, redirectMeta, deferred,
 		$redirect = $(),
 		categories = [],
 		modules = [],
@@ -256,15 +256,12 @@ ve.ui.MWSaveDialog.prototype.showPreview = function ( docOrMsg, baseDoc ) {
 			);
 		}
 
-		// Remove metadata
-		contents = ve.filterMetaElements( Array.prototype.slice.call( body.childNodes ) );
-
 		this.$previewViewer.empty().append(
 			// TODO: This won't work with formatted titles (T122976)
 			$heading.text( docOrMsg.title || mw.Title.newFromText( ve.init.target.getPageName() ).getPrefixedText() ),
 			$redirect,
 			$( '<div>' ).addClass( 'mw-content-' + mw.config.get( 'wgVisualEditor' ).pageLanguageDir ).append(
-				contents
+				body.childNodes
 			)
 		);