try fix tests ME compile again

Author: mawright

.github/workflows/tests.yml

@@ -35,9 +35,8 @@ jobs:
     - name: Build and install MinkowskiEngine
       run: |
         git clone https://github.com/NVIDIA/MinkowskiEngine.git
+        
         cd MinkowskiEngine
-
-        pip install -r requirements.txt
         python setup.py install --blas=openblas --cpu_only 
     
     - name: Run tests with TorchScript enabled