Revert "Add a way to pin a NixOS version within the module system."

This reverts commit a5992ad61b314104aff7e28a41ce101a1b0e7c35. Motivation:

https://github.com/NixOS/nixpkgs/commit/a5992ad61b314104aff7e28a41ce101a1b0e7c35#commitcomment-14986820

3 files changed, 0 insertions, 15 deletions

diff --git a/nixos/doc/manual/configuration/configuration.xml b/nixos/doc/manual/configuration/configuration.xml
index ff00c4feb31a..caba8fb1f4ad 100644
--- a/nixos/doc/manual/configuration/configuration.xml
+++ b/nixos/doc/manual/configuration/configuration.xml
@@ -28,7 +28,6 @@ effect after you run <command>nixos-rebuild</command>.</para>
 <xi:include href="postgresql.xml" />
 <xi:include href="gitlab.xml" />
 <xi:include href="acme.xml" />
-<xi:include href="nixos.xml" />
 
 <!-- Apache; libvirtd virtualisation -->
 
diff --git a/nixos/doc/manual/default.nix b/nixos/doc/manual/default.nix
index 4eda7f94ab4a..4ce6ea1c1118 100644
--- a/nixos/doc/manual/default.nix
+++ b/nixos/doc/manual/default.nix
@@ -58,7 +58,6 @@ let
       cp ${../../modules/services/databases/postgresql.xml} configuration/postgresql.xml
       cp ${../../modules/services/misc/gitlab.xml} configuration/gitlab.xml
       cp ${../../modules/security/acme.xml} configuration/acme.xml
-      cp ${../../modules/misc/nixos.xml} configuration/nixos.xml
       ln -s ${optionsDocBook} options-db.xml
       echo "${version}" > version
     '';
diff --git a/nixos/doc/manual/release-notes/rl-unstable.xml b/nixos/doc/manual/release-notes/rl-unstable.xml
index 5bad7f63b61e..ddbd80a8a00d 100644
--- a/nixos/doc/manual/release-notes/rl-unstable.xml
+++ b/nixos/doc/manual/release-notes/rl-unstable.xml
@@ -12,19 +12,6 @@ has the following highlights:</para>
 <itemizedlist>
 
   <listitem>
-    <para>You can now pin a specific version of NixOS in your <filename>configuration.nix</filename>
-    by setting:
-
-<programlisting>
-nixos.path = ./nixpkgs-unstable-2015-12-06/nixos;
-</programlisting>
-
-    This will make NixOS re-evaluate your configuration with the modules of
-    the specified NixOS version at the given path.  For more details, see
-    <xref linkend="module-misc-nixos" /></para>
-  </listitem>
-
-  <listitem>
     <para>Firefox and similar browsers are now <emphasis>wrapped by default</emphasis>.
     The package and attribute names are plain <literal>firefox</literal>
     or <literal>midori</literal>, etc.  Backward-compatibility attributes were set up,