Remove unused openproject-ui_components dependency

YAGNI. We are not currently loading an UI components from this
library. We should revisit extracting out UI components once our
front-end codebase matures.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge pull request #2318 from opf/feature/remove-ui-components-dependency

Remove unused openproject-ui_components dependency