update doc

Author: xuxueli

xxl-job-admin/src/main/java/com/xxl/job/admin/controller/biz/JobLogController.java

@@ -224,9 +224,9 @@ public Response<String> clearLog(HttpServletRequest request,
 		JobGroupPermissionUtil.validJobGroupPermission(request, jobGroup);
 
 		// valid jobId
-		if (jobId < 1) {
+		/*if (jobId < 1) {
 			return Response.ofFail(I18nUtil.getString("system_please_choose") + I18nUtil.getString("jobinfo_job"));
-		}
+		}*/
 
 		// opt
 		Date clearBeforeTime = null;