refactor: inline UnknownTaskSource type definition

Author: brianrodri

src/data/task.ts

@@ -15,7 +15,7 @@ export interface Task {
 
 export type TaskStatus = { type: "CANCELLED" | "CUSTOM" | "DONE" | "OPEN"; symbol: string } | { type: "UNKNOWN" };
 
-export type TaskSource = UnknownTaskSource | PageTaskSource;
+export type TaskSource = PageTaskSource | { type: "UNKNOWN" };
 
 export interface TaskDates {
     cancelled: DateTime;
@@ -31,10 +31,6 @@ export interface TaskTimes {
     end: DateTime;
 }
 
-export interface UnknownTaskSource {
-    type: "UNKNOWN";
-}
-
 export interface PageTaskSource {
     type: "PAGE";
     path: string;