--- a/b2g/config/mozconfigs/win32_gecko/nightly
+++ b/b2g/config/mozconfigs/win32_gecko/nightly
@@ -1,7 +1,4 @@
 . "$topsrcdir/b2g/config/mozconfigs/common"
-
-# for pgo
-mk_add_options PROFILE_GEN_SCRIPT='$(PYTHON) $(MOZ_OBJDIR)/_profile/pgo/profileserver.py'
 
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
 ac_add_options --enable-update-packaging