user brief introduction allow blank

app/controllers/users_controller.rb

@@ -90,10 +90,6 @@ class UsersController < ApplicationController
 
   def brief_introduction
     content = params[:content].to_s.strip
-    if content.blank?
-      render_error('内容不能为空')
-      return
-    end
 
     current_user.user_extension.update!(brief_introduction: content)