Remove test user after E2E spec

Signed-off-by: Nailia Iskhakova <niskhakova@gitlab.com>

qa/qa/specs/features/ee/browser_ui/1_manage/group/share_group_with_group_spec.rb

@@ -37,6 +37,10 @@ module QA
         source_group_with_members.add_member(maintainer_user, Resource::Members::AccessLevel::MAINTAINER)
       end
 
+      after do
+        maintainer_user.remove_via_api!
+      end
+
       it 'can be shared with another group with correct access level', :requires_admin, testcase: 'https://gitlab.com/gitlab-org/gitlab/-/quality/test_cases/347935' do
         Flow::Login.sign_in