Remove try/except guards for comms and marathon imports

Both are hard dependencies — the guards were dead code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sirmarcel

src/lorem/__init__.py

@@ -1,22 +1,13 @@
-from ._version import __version__
-
-try:
-    from comms import Comms
+from comms import Comms
 
-    comms = Comms("lorem")
-except ModuleNotFoundError:
-    comms = None
+from ._version import __version__
+from .batching import to_batch, to_sample
+from .calculator import Calculator as LOREMCalculator
+from .models.bec import LoremBEC
+from .models.mlip import Lorem
+from .transforms import ToBatch, ToSample
 
-# These modules require marathon and jaxpme at import time.
-# When those are not installed (e.g. CI), we skip them.
-try:
-    from .batching import to_batch, to_sample
-    from .calculator import Calculator as LOREMCalculator
-    from .models.bec import LoremBEC
-    from .models.mlip import Lorem
-    from .transforms import ToBatch, ToSample
-except ModuleNotFoundError:
-    pass
+comms = Comms("lorem")
 
 __all__ = [
     "__version__",

src/lorem/models/__init__.py

@@ -1,7 +1,4 @@
-try:
-    from .bec import LoremBEC
-    from .mlip import Lorem
-except ModuleNotFoundError:
-    pass
+from .bec import LoremBEC
+from .mlip import Lorem
 
 __all__ = ["Lorem", "LoremBEC"]

tests/test_init.py

@@ -1,8 +1,3 @@
-import pytest
-
-comms = pytest.importorskip("comms")
-
-
 def test_version():
     import lorem