diff --git a/.gn b/.gn
index dd2aacc7e05..187094d60ae 100644
--- a/.gn
+++ b/.gn
@@ -13,11 +13,6 @@ import("//dotfile_settings.gni")
 # Location of the build configuration file.
 buildconfig = "//build/config/BUILDCONFIG.gn"
 
-# The secondary source root is a parallel directory tree where
-# GN build files are placed when they can not be placed directly
-# in the source tree, e.g. for third party source trees.
-secondary_source = "//build/secondary/"
-
 # These are the targets to check headers for by default. The files in targets
 # matching these patterns (see "gn help label_pattern" for format) will have
 # their includes checked for proper dependencies when you run either