fix: #3616100 Remove duplicate button.css entry from Claro's theme CSS category

Summary

Fixes Views UI action list button spacing in Claro on the 11.x branch by removing a duplicate CSS entry.

Problem / motivation

The original MR for this issue targeted main, but Claro was removed from core in main (Drupal 12) by #3584639. This MR retargets the fix to 11.x, where Claro is still present and the regression still applies.

claro.libraries.yml lists css/components/button.css under both the component and theme CSS categories in the global-styling library.

Proposed resolution

Remove the duplicate css/components/button.css line under the theme category, leaving the single, correct entry under component.

Files changed

claro.libraries.yml

Testing

Verified locally that button.css loads before views-ui.css in the aggregated CSS output. Verified in a browser that action-list buttons render with correct spacing in rest and hover states.