refactor(Select): remove useless CSS rules

[dgonzalezr]

Description

This PR removes some useless CSS rules from the Select component label.

Related Issue

Fixes #1056

Documentation

Screenshots (if applicable)

Checklist

• I have read the CONTRIBUTING document.
• I have read the CODE OF CONDUCT document.
• I have reviewed my own code.
• I have tested the changes locally.
• I have updated the documentation (if applicable).
• I have added unit tests and e2e tests (if applicable).
• I have requested reviews from relevant team members.

Additional Notes

[nx-cloud]

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✅ Successfully ran 5 targets

• nx run beeq:storybook-build --output-style=stream-without-prefixes
• nx affected -t e2e --exclude=*,!tag:core --parallel=3 --base=e2cc93735de8449b33cade6ffc9fd7952ae4f323 --head=c8dba1e7053c6703f01ec3aa56f25389a69a6ac7 --ci --code-coverage --runInBand
• nx affected -t test --exclude=*,!tag:core --parallel=3 --base=e2cc93735de8449b33cade6ffc9fd7952ae4f323 --head=c8dba1e7053c6703f01ec3aa56f25389a69a6ac7 --ci --runInBand
• nx affected -t lint --exclude=*,!tag:publishable --parallel=3 --base=e2cc93735de8449b33cade6ffc9fd7952ae4f323 --head=c8dba1e7053c6703f01ec3aa56f25389a69a6ac7
• nx affected -t build --exclude=*,!tag:publishable --parallel=3 --base=e2cc93735de8449b33cade6ffc9fd7952ae4f323 --head=c8dba1e7053c6703f01ec3aa56f25389a69a6ac7

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud