From 7ecf739fcfc11203efa1bd4d35251a7892c6b471 Mon Sep 17 00:00:00 2001
From: Amorn Kingthong <37975261+Amorn-Kingthong@users.noreply.github.com>
Date: Thu, 10 May 2018 20:01:26 +0000
Subject: [PATCH] Revert "eth/filter: check nil pointer when unsubscribe
 (#16682)"

This reverts commit 4e7dc34ff1a7469b95eb16f5b4084c26a0ab3662.