remove todo

Data-Meister · Data-Meister · commit 721deae7527a · 2016-01-21T18:02:57.000Z
diff --git a/chapters/strings/finding-substrings.md b/chapters/strings/finding-substrings.md
@@ -35,7 +35,3 @@ substrCount message, " a "
 # => 3
 
 {% endhighlight %}
-
-## Discussion
-
-Still need recipe to count occurrences of a given string within a message.
