remove warnings about vlen-utf8 and vlen-bytes codecs (#3268)

* remove warning about vlen-utf8 codec now that a spec is published

* remove vlen-bytes warning

* changelog

* miscify it

Author: d-v-b

changes/3268.misc.rst

@@ -0,0 +1,2 @@
+Removed warnings that were emitted when using the ``vlen-utf8`` and ``vlen-bytes`` codecs. Those
+warnings are no longer needed now that both of these codecs are backed by specification documents.

src/zarr/codecs/vlen_utf8.py

@@ -2,7 +2,6 @@
 
 from dataclasses import dataclass
 from typing import TYPE_CHECKING
-from warnings import warn
 
 import numpy as np
 from numcodecs.vlen import VLenBytes, VLenUTF8
@@ -25,15 +24,6 @@
 
 @dataclass(frozen=True)
 class VLenUTF8Codec(ArrayBytesCodec):
-    def __init__(self) -> None:
-        warn(
-            "The codec `vlen-utf8` is currently not part in the Zarr format 3 specification. It "
-            "may not be supported by other zarr implementations and may change in the future.",
-            category=UserWarning,
-            stacklevel=2,
-        )
-        super().__init__()
-
     @classmethod
     def from_dict(cls, data: dict[str, JSON]) -> Self:
         _, configuration_parsed = parse_named_configuration(
@@ -80,15 +70,6 @@ def compute_encoded_size(self, input_byte_length: int, _chunk_spec: ArraySpec) -
 
 @dataclass(frozen=True)
 class VLenBytesCodec(ArrayBytesCodec):
-    def __init__(self) -> None:
-        warn(
-            "The codec `vlen-bytes` is currently not part in the Zarr format 3 specification. It "
-            "may not be supported by other zarr implementations and may change in the future.",
-            category=UserWarning,
-            stacklevel=2,
-        )
-        super().__init__()
-
     @classmethod
     def from_dict(cls, data: dict[str, JSON]) -> Self:
         _, configuration_parsed = parse_named_configuration(