refactor: removed unnecessary base-line-height

[nmerget]

Proposed changes

We used base-font-size/-line-height with a calc(var(--db-base-font-size) * var(--db-base-line-height)) function for some components.
But we don't need it, it's the same like the already calculated --db-icon-font-size

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (fix on existing components or architectural decisions)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Further comments

[github-actions]

🔭🐙🐈 Test this branch here: https://db-ux-design-system.github.io/core-web/review/refactor-removed-unnecessary-base-line-height