Remove unused h-3 and w-3 classes

What does this MR do?

This MR removes the h-3 and w-3 CSS class that are not used.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Links

• Closes #57239 (closed)