Revert "Demand prior releases of h5py for OSX on non-arm"

This reverts commit cd5fbb0.

This reverts the constraint added in cd5fbb0 which restricted h5py to
versions <3.15 on Intel macOS based on the assumption that "no whls
[were] built any longer".

However, h5py 3.15.0 (released Oct 13, 2025) and 3.15.1 (released Oct
16, 2025) both include pre-built wheels for Intel macOS (x86_64) for all
supported Python versions (3.10-3.14).

The overly restrictive constraint caused CI test failures starting
Jan 19, 2026 when the macos-15-intel GitHub Actions runner image was
updated (version 20260120.0127.1). The same commit (ccdb659) passed on
Jan 18 but failed on Jan 19, indicating an environmental incompatibility
with the old h5py versions on the new runner.

Fixes failing CI build #21127100740 (macos-15-intel CI failures)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: yarikoptic

pyproject.toml

@@ -53,9 +53,6 @@ dependencies = [
 
     "fasteners",
     "fscacher >= 0.3.0",
-    # Workaround for no wheels for intel OSX as of 3.15
-    "h5py<3.15 ; sys_platform == 'darwin' and platform_machine != 'arm64'",
-    "h5py ; sys_platform != 'darwin' or platform_machine == 'arm64'",
     # 3.14.4: https://github.com/hdmf-dev/hdmf/issues/1186
     "hdmf != 3.5.0,!=3.14.4",
     "humanize",