Saved object tagging: Remove hack to suppress spacer within the EuiInMemoryTable #83161
Description
Initial discussion: #82816 (comment)
In #82816 we implemented the 'bulk action' menu for the tag management section.
To use the correct design, we had to introduce a css hack to hide the spacer that is between the tag action bar and the table.
This is a violation of EUI guidelines. A PR has already been merged upstream to address the root issue: elastic/eui#4246.
When this fix got integrated into Kibana during next EUI upgrade, we need to remove the hack