Remove repeated demo notes from product screens (#28)

frontend/app/lib/kyc/form.dart

@@ -77,7 +77,7 @@ class IdentityForm extends StatelessWidget {
           FilledButton(
             key: const ValueKey('kyc-submit'),
             onPressed: p.canSubmit ? p.submit : null,
-            child: Text(p.isDemo ? l.kycSubmitDemo : l.kycSubmit),
+            child: Text(l.kycSubmit),
           ),
         if (p.step > 0)
           TextButton(onPressed: p.busy ? null : p.back, child: Text(l.kycBack)),