LPS-38712

Hey Brian, after investigating why we need to remove this one and not the others, this goes back to 2011, with a change from Jorge in commit 8fad2cc 'LPS-16331 Improve usability of Site Member Management'. Basically, the separator used to be separating the search container from a button under it, but as of that commit, it was just the bottom most element, so this one is safe tto remove. Thanks\!