Releaser: Remove non needed step (#89)

Author: martinRenou

.github/workflows/publish-release.yml

@@ -17,13 +17,6 @@ jobs:
   publish_release:
     runs-on: ubuntu-latest
     steps:
-      - name: Install Conda environment with Micromamba
-        uses: mamba-org/provision-with-micromamba@main
-        with:
-          environment-name: ci-env
-          environment-file: ci_env.yml
-          channels: conda-forge
-
       - name: Populate Release
         id: populate-release
         uses: jupyter-server/jupyter_releaser/.github/actions/populate-release@v2