Don't empty list of headings in onDestroy

When switching pages in Collectives, `onDestroy` from the old editor
instance happens *after* `onCreate` of the new editor instance. Since
both share the same vuex store, this leads to a race condition where the
old instance clears the list of headings of the new instance.

Since we always set headings during `onCreate` anyway, there's no need
to clear the headings in `onDestroy`, so let's simply get rid of it.

Signed-off-by: Jonas <[email protected]>

Author: mejo-

src/components/Editor/TableOfContents.vue

@@ -34,7 +34,6 @@ export default {
 		}),
 	},
 	mounted() {
-
 		setTimeout(() => {
 			this.initialRender = false
 		}, 1000)

src/nodes/Heading/index.js

@@ -1,7 +1,7 @@
 import TipTapHeading from '@tiptap/extension-heading'
 import { VueNodeViewRenderer } from '@tiptap/vue-2'
 import debounce from 'debounce'
-import { setHeadings, extractHeadings } from './extractor.js'
+import { extractHeadings } from './extractor.js'
 import HeaderViewVue from './HeadingView.vue'
 
 const Heading = TipTapHeading.extend({
@@ -45,14 +45,6 @@ const Heading = TipTapHeading.extend({
 		})
 	},
 
-	onDestroy() {
-		setHeadings([])
-
-		if (this.parent) {
-			this.parent()
-		}
-	},
-
 	onCreate() {
 		extractHeadings(this.editor)