readme: docker remove extra ref to qemu-buildroot-setup

Author: cirosantilli

README.adoc

@@ -422,7 +422,7 @@ The very first time you launch Docker, create the container with:
 
 You are now left inside a shell in the Docker guest.
 
-From there, run the exact same commands that you would on a native install: <<qemu-buildroot-setup>>.
+From there, run the exact same commands that you would on a native install.
 
 The host git top level directory is mounted inside the guest, which means for example that you can use your host's GUI text editor directly on the files.