Revert "feat: implement real tenant creation and listing"

This reverts commit 2742bafb00.

services/dataService.ts

@@ -67,28 +67,3 @@ export const getAttendanceById = async (id: string): Promise<Attendance | undefi
     return undefined;
   }
 };
-
-export const getTenants = async (): Promise<any[]> => {
-  try {
-    const response = await fetch(`${API_URL}/tenants`);
-    if (!response.ok) throw new Error('Falha ao buscar tenants');
-    return await response.json();
-  } catch (error) {
-    console.error("API Error (getTenants):", error);
-    return [];
-  }
-};
-
-export const createTenant = async (tenantData: any): Promise<boolean> => {
-  try {
-    const response = await fetch(`${API_URL}/tenants`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(tenantData)
-    });
-    return response.ok;
-  } catch (error) {
-    console.error("API Error (createTenant):", error);
-    return false;
-  }
-};