Cleanup: Remove unused DataPill.styled.tsx and its test mock

[Copilot]

DataPill.styled.tsx was created but never imported anywhere in the codebase. The corresponding jest.mock in SingleColumnProfile.test.tsx was added purely to satisfy the dead export.

Changes

• Deleted src/components/common/DataPill/DataPill.styled.tsx — unused styled MUI Box component with no consumers
• Removed jest.mock('../../../common/DataPill/DataPill.styled', ...) from SingleColumnProfile.test.tsx — mock existed only because the file existed, not because SingleColumnProfile ever used it

Type of change:

• Bug fix
• Improvement
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation

Checklist:

• I have read the CONTRIBUTING document.
• My PR title is Fixes <issue-number>: <short explanation>
• I have commented on my code, particularly in hard-to-understand areas.
• For JSON Schema changes: I updated the migration scripts or explained why it is not needed.

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[gitar-bot]

Code Review ✅ Approved

Removes unused DataPill.styled.tsx file and its corresponding test mock, cleaning up obsolete code. No issues found.

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Jest test Coverage

UI tests summary

Lines	Statements	Branches	Functions
	66.01% (57270/86756)	45.64% (30194/66153)	48.42% (9068/18726)

[sonarqubecloud]

Quality Gate passed for 'open-metadata-ui'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud