flake.nix: Track hydra master branch

The master branch has caught up with the patches we've been carrying for
the last 12 months or so. We also start following the nix-eval-jobs
version pinned in hydra, so that we stay compatible.

Flake lock file updates:

• Updated input 'hydra':
    'github:NixOS/hydra/c3b6e7b425325b2ea65a0ed638c5913ac32d1a28' (2025-02-16)
  → 'github:NixOS/hydra/1c52c4c0ed596ea71de370562ed5af1604bd2183' (2025-04-07)
• Removed input 'hydra/libgit2'
• Updated input 'hydra/nix':
    'github:NixOS/nix/a7fdef6858dd45b9d7bda7c92324c63faee7f509' (2024-09-19)
  → 'github:NixOS/nix/a4962f73b5fc874d4b16baef47921daf349addfc' (2025-04-07)
• Removed input 'hydra/nix/libgit2'
• Updated input 'hydra/nix-eval-jobs':
    follows 'nix-eval-jobs'
  → 'github:nix-community/nix-eval-jobs/cba718bafe5dc1607c2b6761ecf53c641a6f3b21' (2025-04-07)
• Removed input 'nix-eval-jobs'
• Removed input 'nix-eval-jobs/flake-parts'
• Removed input 'nix-eval-jobs/flake-parts/nixpkgs-lib'
• Removed input 'nix-eval-jobs/nix-github-actions'
• Removed input 'nix-eval-jobs/nix-github-actions/nixpkgs'
• Removed input 'nix-eval-jobs/nixpkgs'
• Removed input 'nix-eval-jobs/treefmt-nix'
• Removed input 'nix-eval-jobs/treefmt-nix/nixpkgs'

Author: mweinelt

flake.lock

@@ -10,12 +10,8 @@
     agenix.url = "github:ryantm/agenix";
     agenix.inputs.nixpkgs.follows = "nixpkgs";
 
-    nix-eval-jobs.url = "github:nix-community/nix-eval-jobs?rev=ca94443b9621c610af09ff1806434bd84cd817e6";
-    nix-eval-jobs.inputs.nixpkgs.follows = "nixpkgs";
-
-    hydra.url = "github:NixOS/hydra/hydra.nixos.org";
+    hydra.url = "github:NixOS/hydra";
     hydra.inputs.nixpkgs.follows = "nixpkgs";
-    hydra.inputs.nix-eval-jobs.follows = "nix-eval-jobs";
     nix.follows = "hydra/nix";
 
     nixos-channel-scripts.url = "github:NixOS/nixos-channel-scripts";