Remove code for cancel button on IC page

This approach is pretty bad as both the cancel and the cross button does the thing, and it is not something we can control on the frontend.

lib/ui/pages/informed_consent_page.dart

@@ -19,30 +19,6 @@ class InformedConsentState extends State<InformedConsentPage> {
     }
   }
 
-  void cancelCallback(RPTaskResult? result) async {
-    info("$runtimeType - Informed Consent canceled");
-
-    await showDialog(
-      context: context,
-      barrierDismissible: false,
-      builder: (BuildContext context) {
-        RPLocalizations locale = RPLocalizations.of(context)!;
-
-        return AlertDialog(
-          title: Text(locale.translate("pages.ic.need_accept")),
-          actions: <Widget>[
-            TextButton(
-              child: Text(locale.translate("pages.ic.go_to_ic")),
-              onPressed: () {
-                context.go('/consent');
-              },
-            )
-          ],
-        );
-      },
-    );
-  }
-
   @override
   Widget build(BuildContext context) {
     RPLocalizations localization = RPLocalizations.of(context)!;
@@ -64,7 +40,6 @@ class InformedConsentState extends State<InformedConsentPage> {
               return RPUITask(
                 task: snapshot.data!,
                 onSubmit: resultCallback,
-                onCancel: cancelCallback,
               );
             }
           }