Remove temporary pint constraint

[cdce8p]

Proposed change

Pint 0.24.4 was release an hour ago with support for flexparser>=0.4.0 and Python 3.13.
We can now remove the constraint added in #130016.

https://github.com/hgrecco/pint/blob/0.24.4/CHANGES
hgrecco/pint@0.24.3...0.24.4

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
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• This PR fixes or closes issue: fixes #
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[cdce8p]

/CC @chemelli74

[chemelli74]

Great!