diff --git a/.github/actions/publish-pypi/action.yaml b/.github/actions/publish-pypi/action.yaml
deleted file mode 100644
index d4fd64fe5..000000000
--- a/.github/actions/publish-pypi/action.yaml
+++ /dev/null
@@ -1,69 +0,0 @@
----
-name: Publish to PyPI via Trusted Publishing
-description: >
-  Download a build artifact, verify its provenance attestations, and upload to
-  PyPI using OIDC-based Trusted Publishing (no long-lived API token).
-
-# This composite action is a workaround for pypi/warehouse#11096: PyPI's
-# Trusted Publisher config matches the OIDC `job_workflow_ref` claim against
-# the *caller's* workflow file, but reusable workflows mint a token whose
-# `job_workflow_ref` names the reusable workflow. Composite actions inherit
-# the calling job's OIDC context, so invoking this action from a downstream
-# caller's `release.yaml` keeps `job_workflow_ref` pointing at that file —
-# which is what the downstream's PyPI Trusted Publisher must register.
-
-inputs:
-  artifact-name:
-    description: Name of the dist artifact uploaded by the upstream build job.
-    required: true
-  attestation-signer-repo:
-    description: >
-      Repository that signed the build attestations, passed to
-      `gh attestation verify --signer-repo`.
-    required: false
-    default: kdeldycke/repomatic
-  repository-url:
-    description: >
-      Optional override for the PyPI repository URL (e.g., TestPyPI). Leave
-      empty to publish to the canonical PyPI index.
-    required: false
-    default: ""
-
-runs:
-  using: composite
-  steps:
-    - uses: astral-sh/setup-uv@6ee6290f1cbc4156c0bdd66691b2c144ef8df19a # v7.4.0
-      with:
-        enable-cache: false
-
-    - name: Download build artifact
-      id: download
-      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
-      with:
-        name: ${{ inputs.artifact-name }}
-
-    - name: Verify build attestations
-      env:
-        GH_TOKEN: ${{ github.token }}
-        DOWNLOAD_PATH: ${{ steps.download.outputs.download-path }}
-        SIGNER_REPO: ${{ inputs.attestation-signer-repo }}
-      shell: bash
-      run: |
-        for f in "${DOWNLOAD_PATH}"/*; do
-          echo "Verifying: ${f}"
-          gh attestation verify "${f}" \
-            --repo "${GITHUB_REPOSITORY}" \
-            --signer-repo "${SIGNER_REPO}"
-        done
-
-    - name: Push to PyPI
-      env:
-        DOWNLOAD_PATH: ${{ steps.download.outputs.download-path }}
-        REPOSITORY_URL: ${{ inputs.repository-url }}
-      shell: bash
-      run: |
-        args=(--no-progress publish --trusted-publishing automatic)
-        if [[ -n "${REPOSITORY_URL}" ]]; then
-          args+=(--publish-url "${REPOSITORY_URL}")
-        fi
-        uv "${args[@]}" "${DOWNLOAD_PATH}"/*