Remove obsolete tests and unused imports in organization members and management components

- Deleted `OrganizationMembersPage` tests as they are no longer relevant.
- Removed unused `updated_at` property from test data in multiple components.
- Cleaned up redundant `useAuth` imports from `OrganizationMembersContent` and `OrganizationManagementContent`.

frontend/tests/app/admin/organizations/[id]/members/page.test.tsx

@@ -1,72 +0,0 @@
-/**
- * Tests for Organization Members Page
- */
-
-import React from 'react';
-import { render, screen } from '@testing-library/react';
-import OrganizationMembersPage from '@/app/admin/organizations/[id]/members/page';
-
-// Mock Next.js navigation
-jest.mock('next/navigation', () => ({
-  useSearchParams: jest.fn(() => new URLSearchParams()),
-  useRouter: jest.fn(() => ({
-    push: jest.fn(),
-    replace: jest.fn(),
-  })),
-}));
-
-// Mock AuthContext
-jest.mock('@/lib/auth/AuthContext', () => ({
-  useAuth: jest.fn(() => ({
-    user: { id: '1', email: 'admin@test.com', is_superuser: true },
-  })),
-}));
-
-// Mock hooks
-jest.mock('@/lib/api/hooks/useAdmin', () => ({
-  useOrganizationMembers: jest.fn(() => ({
-    data: { data: [], pagination: { total: 0, page: 1, page_size: 20, total_pages: 1, has_next: false, has_prev: false } },
-    isLoading: false,
-  })),
-  useGetOrganization: jest.fn(() => ({
-    data: { id: 'org-1', name: 'Test Org', slug: 'test-org', description: '', is_active: true, created_at: '2025-01-01', updated_at: '2025-01-01', member_count: 0 },
-    isLoading: false,
-  })),
-}));
-
-// Mock child components
-jest.mock('@/components/admin/organizations/OrganizationMembersContent', () => ({
-  OrganizationMembersContent: ({ organizationId }: any) => (
-    <div data-testid="organization-members-content">Organization Members Content for {organizationId}</div>
-  ),
-}));
-
-describe('OrganizationMembersPage', () => {
-  const mockParams = { id: 'org-123' };
-
-  it('renders organization members page', () => {
-    render(<OrganizationMembersPage params={mockParams} />);
-
-    expect(screen.getByTestId('organization-members-content')).toBeInTheDocument();
-  });
-
-  it('passes organization ID to content component', () => {
-    render(<OrganizationMembersPage params={mockParams} />);
-
-    expect(screen.getByText(/org-123/)).toBeInTheDocument();
-  });
-
-  it('renders back button link', () => {
-    const { container } = render(<OrganizationMembersPage params={mockParams} />);
-
-    const backLink = container.querySelector('a[href="/admin/organizations"]');
-    expect(backLink).toBeInTheDocument();
-  });
-
-  it('renders container with proper spacing', () => {
-    const { container } = render(<OrganizationMembersPage params={mockParams} />);
-
-    const mainContainer = container.querySelector('.container');
-    expect(mainContainer).toBeInTheDocument();
-  });
-});