add: update user image

app/controllers/organizations/organizations_controller.rb

@@ -70,25 +70,6 @@ class Organizations::OrganizationsController < Organizations::BaseController
   end
 
   private
-  def convert_image!
-    return unless params[:image].present?
-    max_size = EduSetting.get('upload_avatar_max_size') || 2 * 1024 * 1024 # 2M
-    if params[:image].class == ActionDispatch::Http::UploadedFile
-      @image = params[:image]
-      render_error('请上传文件') if @image.size.zero?
-      render_error('文件大小超过限制') if @image.size > max_size.to_i
-    else
-      image = params[:image].to_s.strip
-      return render_error('请上传正确的图片') if image.blank?
-      @image = Util.convert_base64_image(image, max_size: max_size.to_i)
-    end
-  rescue Base64ImageConverter::Error => ex
-    render_error(ex.message)
-  end
-
-  def avatar_path(organization)
-    ApplicationController.helpers.disk_filename(organization.class, organization.id)
-  end
 
   def organization_params
     params.permit(:name, :description, :website, :location,