.nixpkgs: Drop obsolete manifest URI

Dependencies

• [2] MNKXBLNC Return 410 Gone (rather than 500) if an output is no longer available
• [3] PMNWRTGJ Add multiple output support
• [4] XHVZXX6N
• [5] BHZXGT2H * Channels: provide an index page that lists all the packages in the
• [6] HXBXDEFK Speed up channel processing
• [7] ON4DDIBZ * Forgot to commit.
• [8] UXVDOUBJ
• [*] 5NO7NCKT * Refactoring.

Change contents

• edit in src/lib/Hydra/Base/Controller/NixChannel.pm at line 89
  [3.40]→[3.0:95](∅→∅),[2.161]→[3.0:95](∅→∅),[3.1973]→[3.0:95](∅→∅),[3.246]→[3.0:95](∅→∅)
  −

  − $c->stash->{manifestUri} = $c->uri_for($self->action_for("manifest"), $c->req->captures);
• replacement in src/lib/Hydra/View/NixPkg.pm at line 14
  [3.11106]→[3.96:146](∅→∅),[3.211]→[3.96:146](∅→∅)
  − my $s = "NIXPKG1 " . $c->stash->{manifestUri}
  [3.11106]

  [3.272]
  + my $s = "NIXPKG1 http://invalid.org/"