add no cover pragma (#546)

Author: normanrz

numcodecs/zfpy.py

@@ -11,7 +11,7 @@
 if _zfpy_version:
     # Check NumPy version
     _numpy_version: tuple = tuple(map(int, version("numpy").split('.')))
-    if _numpy_version >= (2, 0, 0) and _zfpy_version <= (1, 0, 1):
+    if _numpy_version >= (2, 0, 0) and _zfpy_version <= (1, 0, 1):  # pragma: no cover
         _zfpy_version = ()
         warnings.warn(
             "NumPy version >= 2.0.0 detected. The zfpy library is incompatible with this version of NumPy. "