remove minieditorsession

app/components/SimpleEditor/Editor.js

@@ -243,7 +243,6 @@ class Editor extends ProseEditor {
 
     // notes provider
     const notesProvider = new NotesProvider(doc, {
-      miniEditorSession: '',
       miniEditorContext: ''
     })
 

app/components/SimpleEditor/miniEditor/miniEditor.js

@@ -15,7 +15,6 @@ class MiniEditor extends ProseEditor {
   didMount () {
     const provider = this.getProvider()
     provider.config.miniEditorContext = this.getChildContext()
-    provider.config.miniEditorSession = this.editorSession
     this.editorSession.onUpdate('document', this.findNote, this)
     this.on('noteSelected', this.scrollTo, this)
     this.on('notes:inserted', this.createNote, this)

app/components/SimpleEditor/panes/Comments/CommentsProvider.js

@@ -283,7 +283,11 @@ class CommentsProvider extends TocProvider {
   }
 
   getMiniDocument () {
-    return this.config.controller.context.notesProvider.config.miniEditorSession.document
+    const notesProvider = this.config.controller.context.notesProvider
+    const miniEditorContext = notesProvider.config.miniEditorContext
+    if (!miniEditorContext) return
+
+    return miniEditorContext.editorSession.document
   }
 
   isSelectionLargerThanComments () {