Removed unnecessary comprehension

[kaitlynrying]

Describe your changes
Removed unnecessary list comprehension in lines 132 and 149 in hyper_histogram.py

Type of update
This is a

• Bug fix

Associated issues
Related to Deepsource PTC-W0016

For the reviewer
See this page for instructions on how to review the pull request.

• PR functionality reviewed in a Jupyter Notebook
• All tests pass
• Test coverage remains 100%
• Documentation tested
• New documentation pages added to plantcv/mkdocs.yml
• Changes to function input/output signatures added to updating.md
• Code reviewed
• PR approved

[deepsource-io]

Here's the code health analysis summary for commits 4b7c85d..f8e1434. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Python	✅ Success	🎯 2 occurences resolved	View Check ↗
Test coverage	⚠️ Artifact not reported	Timed out: Artifact was never reported	View Check ↗

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