fix: remove redundant inits from _loaders/__init__.py (#233)

this PR resolves #225 by removing all redundant `import` statements and
the `__all__` list from `pyaptamer/datasets/_loaders/__init__.py`.

As noted in the issue, `_loaders` is a private directory, and exposing
its contents in its own `__init__.py` only created unnecessary
double-work when adding new dataset loaders to the project.please note
that in this PR i did not delete the file.

Closes #225

Author: Dreamstick9

pyaptamer/datasets/_loaders/__init__.py

@@ -1,26 +1 @@
-"""Loaders for different data structures."""
-
-from pyaptamer.datasets._loaders._aptacom_loader import (
-    load_aptacom_full,
-    load_aptacom_x_y,
-)
-from pyaptamer.datasets._loaders._csv_loader import load_csv_dataset
-from pyaptamer.datasets._loaders._hf_loader import load_hf_dataset
-from pyaptamer.datasets._loaders._hf_to_dataset_loader import load_hf_to_dataset
-from pyaptamer.datasets._loaders._li2014 import load_li2014
-from pyaptamer.datasets._loaders._one_gnh import load_1gnh_structure
-from pyaptamer.datasets._loaders._pfoa import load_pfoa_structure
-
-__all__ = [
-    "load_pfoa_structure",
-    "load_1gnh_structure",
-    "load_aptacom_full",
-    "load_aptacom_x_y",
-    "load_csv_dataset",
-    "load_hf_dataset",
-    "load_hf_to_dataset",
-    "load_pfoa_structure",
-    "load_1gnh",
-    "load_1gnh_structure",
-    "load_li2014",
-]
+"""Private loaders module. Imports are exposed via `pyaptamer/datasets/__init__.py`."""