build: drop release-plz

Don't want to publish on crates.io and release-plz wants to insist on
it.

.forgejo/workflows/push-main.yml

@@ -1,29 +0,0 @@
-name: Release Please
-
-permissions:
-  pull-requests: write
-  contents: write
-
-on:
-  push:
-    branches:
-      - main
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  release-plz:
-    name: Release-plz
-    runs-on: docker
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: Run release-plz release-pr
-        uses: https://git.kemitix.net/kemitix/rust@v2.1.0
-        with:
-          args: release-plz release-pr --backend gitea --git-token ${{ secrets.FORGEJO_TOKEN }}
-        env:
-          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

release-plz.toml

@@ -1,25 +0,0 @@
-[workspace]
-# Disable git releases for all packages by default
-git_release_enable = true
-
-# Disable git tags for all packages by default
-git_tag_enable = true
-
-# set the path of all the crates to the changelog to the root of the repository
-changelog_path = "./CHANGELOG.md"
-
-[changelog]
-body = """
-
-## [{{ version | trim_start_matches(pat="v") }}]{%- if release_link -%}({{ release_link }}){% endif %} - {{ timestamp | date(format="%Y-%m-%d") }}
-{% for group, commits in commits | group_by(attribute="group") %}
-### {{ group | upper_first }}
-{% for commit in commits %}
-{%- if commit.scope -%}
-- *({{commit.scope}})* {% if commit.breaking %}[**breaking**] {% endif %}{{ commit.message }}{%- if commit.links %} ({% for link in commit.links %}[{{link.text}}]({{link.href}}) {% endfor -%}){% endif %}
-{% else -%}
-- {% if commit.breaking %}[**breaking**] {% endif %}{{ commit.message }}
-{% endif -%}
-{% endfor -%}
-{% endfor -%}
-"""