fix #69, remove German line

Author: niccokunzmann

steps/05-01-sets-with-ranges.html

@@ -4,7 +4,6 @@
 lang: en
 ---
 <p>
-  Du kannst Bereiche abkürzen, indem du statt aller Zeichen einen
   You can shorten ranges of characters by writing a minus 
   <span class="regex">-</span> between the characters.
   To find all digits from 1 to 5, you can use <span class="regex">[1-5]</span>.