ci: nuke install libsodium-dev step

Author: sorki

.github/workflows/ci.dhall

@@ -4,20 +4,7 @@ let haskellCi =
 let defSteps = haskellCi.defaultCabalSteps
 
 in    haskellCi.generalCi
-        ( haskellCi.withNix
-            ( defSteps
-              with extraSteps.pre
-                   =
-                    defSteps.extraSteps.pre
-                  # [ haskellCi.installCachixStep "hnix-store"
-                    , haskellCi.BuildStep.NameIf
-                        { name = "Install libsodium"
-                        , run = "sudo apt install libsodium-dev"
-                        , `if` = "matrix.os == 'ubuntu-latest'"
-                        }
-                    ]
-            )
-        )
+        (haskellCi.withNix defSteps)
         haskellCi.DhallMatrix::{
         , ghc =
           [ haskellCi.GHC.GHC963

.github/workflows/ci.dhall.frozen

@@ -5,20 +5,7 @@ let haskellCi =
 let defSteps = haskellCi.defaultCabalSteps
 
 in    haskellCi.generalCi
-        ( haskellCi.withNix
-            ( defSteps
-              with extraSteps.pre
-                   =
-                    defSteps.extraSteps.pre
-                  # [ haskellCi.installCachixStep "hnix-store"
-                    , haskellCi.BuildStep.NameIf
-                        { name = "Install libsodium"
-                        , run = "sudo apt install libsodium-dev"
-                        , `if` = "matrix.os == 'ubuntu-latest'"
-                        }
-                    ]
-            )
-        )
+        (haskellCi.withNix defSteps)
         haskellCi.DhallMatrix::{
         , ghc =
           [ haskellCi.GHC.GHC963

.github/workflows/ci.yaml

@@ -7,13 +7,6 @@ jobs:
     - uses: "cachix/install-nix-action@v23"
       with:
         nix_path: "nixpkgs=channel:nixos-unstable"
-    - uses: "cachix/cachix-action@v12"
-      with:
-        name: "hnix-store"
-        signingKey: "${{ secrets.CACHIX_SIGNING_KEY }}"
-    - if: "matrix.os == 'ubuntu-latest'"
-      name: Install libsodium
-      run: "sudo apt install libsodium-dev"
     - uses: "actions/checkout@v4"
       with:
         submodules: recursive