Revert "integrate release-plz (#3739)"

This reverts commit 6af820e880.

.github/workflows/release-plz.yml

@@ -1,57 +0,0 @@
-name: Release-plz
-
-on:
-  push:
-    branches:
-      - main
-      - v0.8.x
-
-jobs:
-  # Release unpublished packages.
-  release-plz-release:
-    name: Release-plz release
-    runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'tokio-rs' }}
-    permissions:
-      contents: write
-      pull-requests: read
-      id-token: write
-    steps:
-      - &checkout
-        name: Checkout repository
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-      - &install-rust
-        name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9 # stable
-        with:
-          toolchain: stable
-      - name: Run release-plz
-        uses: release-plz/action@1528104d2ca23787631a1c1f022abb64b34c1e11 # v0.5
-        with:
-          command: release
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-  # Create a PR with the new versions and changelog, preparing the next release.
-  release-plz-pr:
-    name: Release-plz PR
-    runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'tokio-rs' }}
-    permissions:
-      contents: write
-      pull-requests: write
-    concurrency:
-      group: release-plz-${{ github.ref }}
-      cancel-in-progress: false
-    steps:
-      - *checkout
-      - *install-rust
-      - name: Run release-plz
-        uses: release-plz/action@1528104d2ca23787631a1c1f022abb64b34c1e11 # v0.5
-        with:
-          command: release-pr
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

axum/release-plz.toml

@@ -1,8 +0,0 @@
-[workspace]
-# Only release when the release PR is merged, not on every commit
-# https://release-plz.dev/docs/config#the-release_always-field
-release_always = false
-
-# Label release PRs for easy identification
-# https://release-plz.dev/docs/config#the-pr_labels-field
-pr_labels = ["release"]