diff --git a/doc/setup.rst b/doc/setup.rst
index af2b36cd08..1c4dc568d1 100644
--- a/doc/setup.rst
+++ b/doc/setup.rst
@@ -124,7 +124,6 @@ Finally, you'll need to use `Yarn`_ to install some JavaScript dependencies:
 
     yarn install --production
 
-The --production flag is used to ignore the develop dependencies in `Yarn`_.
 .. _composer:
 
 Installing using Composer