remove garbage

Author: d-v-b

docs/design/sync-bypass.md

@@ -482,10 +482,8 @@ async def write(
     # event loop, it overrides these methods and sets supports_sync_io
     # to True. This lets Array selection methods bypass sync() entirely.
     #
-    # The default implementations raise NotImplementedError, so
-    # BatchedCodecPipeline (the standard pipeline) is unaffected.
-    #
-    # See docs/design/sync-bypass.md for the full design rationale.
+    # The default implementations raise NotImplementedError.
+    # BatchedCodecPipeline overrides these when all codecs support sync.
     # -------------------------------------------------------------------
 
     @property

src/zarr/abc/codec.py

@@ -14,13 +14,7 @@
 
 from dataclasses import dataclass
 
-from zarr.core.codec_pipeline import (
-    BatchedCodecPipeline,
-    _CODEC_DECODE_NS_PER_BYTE,  # noqa: F401
-    _CODEC_ENCODE_NS_PER_BYTE,  # noqa: F401
-    _choose_workers,  # noqa: F401
-    _estimate_chunk_work_ns,  # noqa: F401
-)
+from zarr.core.codec_pipeline import BatchedCodecPipeline
 from zarr.registry import register_pipeline
 
 __all__ = ["SyncCodecPipeline"]