delete unused code

chai_lab/data/parsing/fasta.py

@@ -3,8 +3,6 @@
 from pathlib import Path
 from typing import Iterable
 
-import fsspec
-
 from chai_lab.data.parsing.structure.entity_type import EntityType
 from chai_lab.data.residue_constants import restype_1to3_with_x
 
@@ -26,21 +24,6 @@
 }
 
 
-def _fasta_to_str(fasta: Fasta) -> str:
-    header, sequence = fasta
-    return f">{header}\n{sequence}\n"
-
-
-def fastas_to_str(fastas: Fastas) -> str:
-    return "".join(_fasta_to_str(fasta) for fasta in fastas)
-
-
-def write_fastas(fastas: Fastas, output_path: str):
-    logger.debug(f"Writing {len(fastas)} sequences to {output_path}")
-    with fsspec.open(output_path, "w") as fp:
-        fp.write(fastas_to_str(fastas))
-
-
 def read_fasta(file_path: str | Path) -> Iterable[Fasta]:
     from Bio import SeqIO