removed nonexisting reference

Yurii Shevchuk · Yurii Shevchuk · commit 4fd073d93c5f · 2019-01-28T20:31:11.000+01:00
diff --git a/site/docs/secondary.rst b/site/docs/secondary.rst
@@ -7,5 +7,4 @@ This part of documentation contains secondary feature from NeuPy library.
     :glob:
     :maxdepth: 2
 
-    secondary/utils
     secondary/visualizations
