update remove by path for delete descendant pages

packages/app/src/server/models/obsolete-page.js

@@ -672,11 +672,20 @@ export const getPageSchema = (crowi) => {
 
   };
 
-  pageSchema.statics.removeByPath = function(path) {
+  pageSchema.statics.removeByPath = async function(path) {
     if (path == null) {
       throw new Error('path is required');
     }
-    return this.findOneAndRemove({ path }).exec();
+
+    // https://regex101.com/r/guaY11/1
+    const regex = new RegExp(`^${path}/.+$`);
+    const deleteManyPromise = this.deleteMany({ path: regex });
+    const findOneAndRemovePromise = this.findOneAndRemove({ path });
+
+    return await Promise.all([
+      deleteManyPromise,
+      findOneAndRemovePromise,
+    ]);
   };
 
   pageSchema.statics.findListByPathsArray = async function(paths, includeEmpty = false) {