BLD: GitHub tests.yml to remove PyTorch installation step and update step numbering

Author: xiaochendu

.github/workflows/tests.yml

@@ -26,35 +26,29 @@ jobs:
         init-shell: bash
         generate-run-shell: true
 
-    # 3. Install PyTorch using pip
-    - name: Install PyTorch with pip
-      shell: micromamba-shell {0}
-      run: |
-        pip install "torch<2.6.0,>=2.1.0"
-
-    # 4. Install local and dev dependencies using uv
+    # 3. Install local and dev dependencies using uv
     - name: Install Python dependencies with uv
       shell: micromamba-shell {0}
       run: |
         uv pip install -e '.[dev]'
 
-    # 5. Set up environment variables for LAMMPS
+    # 4. Set up environment variables for LAMMPS
     - name: Configure LAMMPS paths
       shell: micromamba-shell {0}
       run: |
         echo "LAMMPS_POTENTIALS=$GITHUB_WORKSPACE/mcmc/potentials" >> $GITHUB_ENV
         echo "LAMMPS_COMMAND=$(which lmp)" >> $GITHUB_ENV
         echo "ASE_LAMMPSRUN_COMMAND=$(which lmp)" >> $GITHUB_ENV
 
-    # 6. Display environment variables for debugging
+    # 5. Display environment variables for debugging
     - name: Print LAMMPS paths
       shell: micromamba-shell {0}
       run: |
         echo "LAMMPS_POTENTIALS = $LAMMPS_POTENTIALS"
         echo "LAMMPS_COMMAND = $LAMMPS_COMMAND"
         echo "ASE_LAMMPSRUN_COMMAND = $ASE_LAMMPSRUN_COMMAND"
 
-    # 7. Run test suite
+    # 6. Run test suite
     - name: Run tests with pytest
       shell: micromamba-shell {0}
       run: |