Remove obsolete workaround

This is actually an issue on some nested create forms that still use an
old workaround that we implemented a while back to fix modals not
closing and success toasts not being dispatched, at the expense of
backend validation errors being displayed.
I do not remember how this was solved, however this workaround is
definitely not longer needed, and can just be YEETed on sight.

frontend/src/routes/(app)/(internal)/risk-assessments/[id=uuid]/+page.svelte

@@ -53,29 +53,6 @@
 		}
 	}
 
-	let { form: deleteForm, message: deleteMessage } = {
-		form: {},
-		message: {}
-	};
-
-	let { form: createForm, message: createMessage } = {
-		form: {},
-		message: {}
-	};
-
-	// NOTE: This is a workaround for an issue we had with getting the return value from the form actions after switching pages in route /[model=urlmodel]/ without a full page reload.
-	// invalidateAll() did not work.
-	$: {
-		({ form: createForm, message: createMessage } = superForm(data.scenarioCreateForm, {
-			onUpdated: ({ form }) =>
-				handleFormUpdated({ form, pageStatus: $page.status, closeModal: true })
-		}));
-		({ form: deleteForm, message: deleteMessage } = superForm(data.scenarioDeleteForm, {
-			onUpdated: ({ form }) =>
-				handleFormUpdated({ form, pageStatus: $page.status, closeModal: true })
-		}));
-	}
-
 	function modalCreateForm(): void {
 		const modalComponent: ModalComponent = {
 			ref: CreateModal,

frontend/src/routes/(app)/(internal)/risk-scenarios/[id=uuid]/edit/+page.svelte

@@ -94,22 +94,6 @@
 		}
 	}
 
-	let { form: measureCreateForm, message: measureCreateMessage } = {
-		form: {},
-		message: {}
-	};
-
-	// NOTE: This is a workaround for an issue we had with getting the return value from the form actions after switching pages in route /[model=urlmodel]/ without a full page reload.
-	// invalidateAll() did not work.
-	$: {
-		({ form: measureCreateForm, message: measureCreateMessage } = superForm(
-			data.measureCreateForm,
-			{
-				onUpdated: ({ form }) =>
-					handleFormUpdated({ form, pageStatus: $page.status, closeModal: true })
-			}
-		));
-	}
 	const next = getSecureRedirect($page.url.searchParams.get('next'));
 
 	const probabilityColorMap = data.riskMatrix.probability.map(

frontend/src/routes/(app)/(third-party)/requirement-assessments/[id=uuid]/edit/+page.svelte

@@ -162,34 +162,6 @@
 
 	$: if (createAppliedControlsLoading === true && form) createAppliedControlsLoading = false;
 
-	let { form: measureCreateForm, message: measureCreateMessage } = {
-		form: {},
-		message: {}
-	};
-	let { form: evidenceCreateForm, message: evidenceCreateMessage } = {
-		form: {},
-		message: {}
-	};
-
-	// NOTE: This is a workaround for an issue we had with getting the return value from the form actions after switching pages in route /[model=urlmodel]/ without a full page reload.
-	// invalidateAll() did not work.
-	$: {
-		({ form: measureCreateForm, message: measureCreateMessage } = superForm(
-			data.measureCreateForm,
-			{
-				onUpdated: ({ form }) =>
-					handleFormUpdated({ form, pageStatus: $page.status, closeModal: true })
-			}
-		));
-		({ form: evidenceCreateForm, message: evidenceCreateMessage } = superForm(
-			data.evidenceCreateForm,
-			{
-				onUpdated: ({ form }) =>
-					handleFormUpdated({ form, pageStatus: $page.status, closeModal: true })
-			}
-		));
-	}
-
 	$: mappingInference = {
 		sourceRequirementAssessment:
 			data.requirementAssessment.mapping_inference.source_requirement_assessment,