Drop unused Python 3.7 compatibility code (#406)

Now that Python 3.8 is the minimum supported version, there is no need for this `typing_extensions` branch or a dependency on `typing-extensions`. So drop both to cleanup the code. Also should bring coverage back up.
zarr-developers · Dec 14, 2022 · f9f4cd3 · f9f4cd3
1 parent 4a029c9
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diff --git a/docs/release.rst b/docs/release.rst
@@ -44,7 +44,7 @@ Maintenance
   By :user:`Dimitri Papadopoulos Orfanos <DimitriPapadopoulos>`, :issue:`369`.
 
 * Drop Python 3.7.
-  By :user:`John Kirkham <jakirkham>`, :issue:`405`.
+  By :user:`John Kirkham <jakirkham>`,, :issue:`405` :issue:`406`.
 
 * Test with zfpy 1.0.0.
   By :user:`John Kirkham <jakirkham>`, :issue:`385`.

diff --git a/numcodecs/ndarray_like.py b/numcodecs/ndarray_like.py
@@ -1,10 +1,4 @@
-import sys
-from typing import Any, Dict, Optional, Tuple, Type
-
-if sys.version_info >= (3, 8):
-    from typing import Protocol, runtime_checkable
-else:
-    from typing_extensions import Protocol, runtime_checkable
+from typing import Any, Dict, Optional, Protocol, Tuple, Type, runtime_checkable
 
 
 class _CachedProtocolMeta(Protocol.__class__):

diff --git a/pyproject.toml b/pyproject.toml
@@ -17,7 +17,6 @@ readme =  "README.rst"
 dependencies = [
     "entrypoints",
     "numpy>=1.7",
-    "typing-extensions>=3.7.4"
 ]
 requires-python = ">=3.8"
 dynamic = [