hxtorch(BrainScaleS): Fix dependencies on py-torch{,vision}

packages/hxtorch/package.py

@@ -46,7 +46,8 @@ class Hxtorch(WafPackage):
     depends_on('py-pycodestyle', type=('build', 'link', 'run'))
     depends_on('py-pyelftools', type=('build', 'link', 'run'))
     depends_on('py-pylint', type=('build', 'link', 'run'))
-    depends_on('py-torch', type=('build', 'link', 'run'))
+    depends_on('py-torch@1.9.1:', type=('build', 'link', 'run'))
+    depends_on('py-torchvision', type=('run')) # for demos
     depends_on('py-pyyaml', type=('build', 'link', 'run'))
     depends_on('py-scipy', type=('build', 'link', 'run'))
     depends_on('py-sqlalchemy', type=('build', 'link', 'run'))

spack.yaml

@@ -56,7 +56,6 @@ spack:
     - py-efel@4.0.4
     - py-hbp-neuromorphic-platform@0.10.1
     - py-torch~cuda~rocm~valgrind~mkldnn~mpi~gloo+tensorpipe~onnx_ml@1.11.0:^protobuf@:3.17.999
-    - py-torchvision
     - py-lfpy@2.3
     - py-elephant
     - py-frites