ci: remove workflow for dotfiles input update

Forgot it's here especially that I have a way to manage them files.

.github/workflows/automate-dotfiles-input-update.yml

@@ -1,30 +0,0 @@
-name: "Automated flake input update for my dotfiles"
-on:
-  schedule:
-    # Every day.
-    - cron: '30 0 * * *'
-env:
-  GIT_AUTHOR_NAME: "github-actions[bot]"
-  GIT_AUTHOR_EMAIL: "github-actions[bot]@users.noreply.github.com"
-  GIT_COMMITTER_NAME: "github-actions[bot]"
-  GIT_COMMITTER_EMAIL: "github-actions[bot]@users.noreply.github.com"
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v22
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - name: Update flake inputs
-        run: |
-          nix flake lock --impure \
-            --update-input 'dotfiles' \
-            --commit-lock-file --commit-lockfile-summary "flake.lock: update dotfiles"
-      - name: Build NixOS configurations that uses the dotfiles
-        run: nix build .#nixosConfigurations.ni.config.system.build.toplevel
-      - name: Push updates to remote
-        run: |
-          git remote remove origin
-          git remote add origin https://${{ secrets.GITHUB_TOKEN }}@github.com/foo-dogsquared/nixos-config.git
-          git push --set-upstream origin master --tags