revert: revert genbank update

python/biobear/genbank_reader.py

@@ -1,9 +1,6 @@
 """Genbank file reader."""
 import os
 
-import pyarrow as pa
-import pyarrow.dataset as ds
-
 from biobear.reader import Reader
 from biobear.compression import Compression
 
@@ -30,26 +27,6 @@ def __init__(
         else:
             self._reader = _ExonReader(str(path), "GENBANK", None)
 
-    def to_polars(self):
-        """Read the GFF file and return a polars DataFrame."""
-        try:
-            import polars as pl
-        except ImportError as import_error:
-            raise ImportError(
-                "The polars library is required to convert a GFF file "
-                "to a polars DataFrame."
-            ) from import_error
-
-        return pl.from_arrow(self.to_arrow().read_all())
-
-    def to_arrow(self) -> pa.RecordBatchReader:
-        """Convert the GFF reader to an arrow batch reader."""
-        return self._reader.to_pyarrow()
-
-    def to_arrow_scanner(self) -> ds.Scanner:
-        """Convert the GFF reader to an arrow scanner."""
-        return ds.Scanner.from_batches(self.to_arrow())
-
     @property
     def inner(self):
         """Return the inner reader."""