Remove repeated demo notes from product screens (#28)

frontend/app/lib/kyc/page.dart

@@ -149,21 +149,6 @@ class IdentityPageState extends State<IdentityPage> {
                         ),
                         const SizedBox(height: 12),
                         Text(l.kycIntro, style: t.textTheme.bodyLarge),
-                        const SizedBox(height: 20),
-                        if (p.isDemo)
-                          Container(
-                            padding: const EdgeInsets.all(16),
-                            decoration: BoxDecoration(
-                              color: t.colorScheme.tertiaryContainer,
-                              borderRadius: BorderRadius.circular(16),
-                            ),
-                            child: Text(
-                              l.kycDemo,
-                              style: TextStyle(
-                                color: t.colorScheme.onTertiaryContainer,
-                              ),
-                            ),
-                          ),
                         const SizedBox(height: 24),
                         if (p.busy) ...[
                           const LinearProgressIndicator(),