Revert "Update languagedetect library"

library/langdet/docs/confidence.php

@@ -0,0 +1,18 @@
+<?php
+require_once 'Text/LanguageDetect.php';
+
+$text = 'Was wäre, wenn ich Ihnen das jetzt sagen würde?';
+
+$ld = new Text_LanguageDetect();
+//3 most probable languages
+$results = $ld->detect($text, 3);
+
+foreach ($results as $language => $confidence) {
+    echo $language . ': ' . number_format($confidence, 2) . "\n";
+}
+
+//output:
+//german: 0.35
+//dutch: 0.25
+//swedish: 0.20
+?>