gistfile1.txt

def index
    @admin = Admin.all
  end

  def new
  	@admin = Admin.new
  end

def destroy
    @admin.destroy
    respond_to do |format|
      format.html { redirect_to dashboard_path, notice: "<%= admin.full_name %> slettet." }
      format.json { head :no_content }
    end
	end

index.html.erb

<%= link_to '<i class="icon-trash bigger-120"></i>'.html_safe, admin_registration_path(admin), method: :delete, data: { confirm: 'Are you sure?' %>