allow team member deletions

Author: thedumbtechguy

packages/admin_dashboard_portal/app/policies/admin_dashboard_portal/hackathon/team_membership_policy.rb

@@ -4,4 +4,9 @@ class AdminDashboardPortal::Hackathon::TeamMembershipPolicy < ::Hackathon::TeamM
   def create?
     false
   end
+
+  def destroy?
+    # Allow destroying team memberships, but not the team owner's membership
+    record.team.hacker_id != record.hacker_id
+  end
 end