Revert "all: Use ->remove() instead of ->outertext = ''"

This reverts commit 052844f5e1.

There is a bug in ->remove() that causes the parser to incorrectly
identify elements in the DOM tree that shouldn't exist anymore.

References #1151

bridges/XenForoBridge.php

@@ -193,7 +193,7 @@ class XenForoBridge extends BridgeAbstract {
 
 			// Remove script tags
 			foreach($content->find('script') as $script) {
-				$script->remove();
+				$script->outertext = '';
 			}
 
 			$item['content'] = $content->innertext;