MAINTAINERS: ena: remove Zorik Machulsky from reviewers

While ENA has 3 reviewers and 2 maintainers, we mostly see review
tags and comments from the maintainers. While we very much appreciate
Zorik's invovment in the community let's trim the reviewer list
down to folks we've seen tags from.

Subsystem AMAZON ETHERNET DRIVERS
  Changes 13 / 269 (4%)
  Last activity: 2020-11-24
  Netanel Belgazal <netanel@amazon.com>:
    Author 24dee0c7478d 2019-12-10 00:00:00 43
    Tags 0e3a3f6dacf0 2020-07-21 00:00:00 47
  Arthur Kiyanovski <akiyano@amazon.com>:
    Author 0e3a3f6dacf0 2020-07-21 00:00:00 79
    Tags 09323b3bca95 2020-11-24 00:00:00 104
  Guy Tzalik <gtzalik@amazon.com>:
    Tags 713865da3c62 2020-09-10 00:00:00 3
  Saeed Bishara <saeedb@amazon.com>:
    Tags 470793a78ce3 2020-02-11 00:00:00 2
  Zorik Machulsky <zorik@amazon.com>:
  Top reviewers:
    [4]: sameehj@amazon.com
    [3]: snelson@pensando.io
    [3]: shayagr@amazon.com
  INACTIVE MAINTAINER Zorik Machulsky <zorik@amazon.com>

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index a06faf9..64dd19d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -820,7 +820,6 @@
 M:	Arthur Kiyanovski <akiyano@amazon.com>
 R:	Guy Tzalik <gtzalik@amazon.com>
 R:	Saeed Bishara <saeedb@amazon.com>
-R:	Zorik Machulsky <zorik@amazon.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	Documentation/networking/device_drivers/ethernet/amazon/ena.rst