Fix pixi

Author: sanders41

.github/workflows/testing.yml

@@ -391,7 +391,6 @@ jobs:
       - name: Install Pixi
         uses: prefix-dev/[email protected]
         with:
-          manifest-path: ${{ env.WORKING_DIR }}/pyproject.toml
           pixi-version: v0.57.0
       - name: Set up Python
         working-directory: ${{ env.WORKING_DIR }}
@@ -426,7 +425,6 @@ jobs:
       - name: Install Pixi
         uses: prefix-dev/[email protected]
         with:
-          manifest-path: ${{ env.WORKING_DIR }}/pyproject.toml
           pixi-version: v0.57.0
       - name: Set up Python
         working-directory: ${{ env.WORKING_DIR }}