Drop careless-gpu: the [cuda] pip extra install covers GPU and CPU nodes

The installed careless/0.5.4 venv already contains the NVIDIA wheels
([cuda] extra), which need only the node driver and fall back to CPU,
so a separate GPU module and cuda module dep are unnecessary. Revert
careless/build to careless[cuda] to match the actual install.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

careless-gpu/modulefile

@@ -1,16 +0,0 @@
-#%Module1.0
-
-module-whatis       "careless (GPU) - merging crystallography data with variational inference"
-module-url          "https://github.com/rs-station/careless"
-module-license      "MIT"
-module-maintainer   "MX Data <jiaxin.duan@psi.ch>"
-
-module-help     "
-careless: scaling and merging of X-ray diffraction data using
-approximate Bayesian inference (TensorFlow). GPU build: CUDA is
-provided by the cuda/12.8.1 module, auto-loaded as a runtime dep.
-Use on nodes with an NVIDIA GPU; for CPU nodes load careless instead.
-"
-
-setenv          CARELESS_ENV    $PREFIX/venv
-prepend-path    PATH            $PREFIX/venv/bin