Moves DraftAttachments into redux

ts/types/Attachment.ts

@@ -55,6 +55,7 @@ export type AttachmentType = {
     contentType: MIME.MIMEType;
     path: string;
   };
+  screenshotData?: Uint8Array;
   screenshotPath?: string;
   flags?: number;
   thumbnail?: ThumbnailType;
@@ -96,19 +97,6 @@ export type InMemoryAttachmentDraftType =
       pending: true;
     };
 
-export type OnDiskAttachmentDraftType =
-  | ({
-      caption?: string;
-      pending: false;
-      screenshotPath?: string;
-    } & BaseAttachmentDraftType)
-  | {
-      contentType: MIME.MIMEType;
-      fileName: string;
-      path: string;
-      pending: true;
-    };
-
 export type AttachmentDraftType =
   | ({
       url: string;