chore(ci): Remove obsolete prefligit action

Now using prek directly via uvx, this custom action is no longer needed.

.forgejo/actions/prefligit/action.yml

@@ -1,27 +0,0 @@
-name: prefligit
-description: |
-  Runs prefligit, pre-commit reimplemented in Rust.
-inputs:
-  extra_args:
-    description: options to pass to pre-commit run
-    required: false
-    default: '--all-files'
-
-runs:
-  using: composite
-  steps:
-  - name: Install uv
-    uses: https://github.com/astral-sh/setup-uv@v6
-    with:
-      enable-cache: true
-      ignore-nothing-to-cache: true
-  - name: Install Prefligit
-    shell: bash
-    run: |
-      curl --proto '=https' --tlsv1.2 -LsSf https://github.com/j178/prefligit/releases/download/v0.0.10/prefligit-installer.sh | sh
-  - uses: actions/cache@v3
-    with:
-      path: ~/.cache/prefligit
-      key: prefligit-0|${{ hashFiles('.pre-commit-config.yaml') }}
-  - run: prefligit run --show-diff-on-failure --color=always -v ${{ inputs.extra_args }}
-    shell: bash