MAINTAINERS: remove sjg20

sjg20 hasn't reviewed any PRs or engaged in any Zephyr
activity since Aug 2023.

Recent activities:

- review: Review on 'fuel_gauge: Add battery cutoff support'
  zephyrproject-rtos#61435
  (2023-08-16T20:23:21Z)
- review: Review on 'emul: Only add enabled DT nodes to bus emulators'
  zephyrproject-rtos#60263
  (2023-07-11T19:59:15Z)
- review: Review on 'drivers/crypto/it8xxx2: add support for SHA256
  hardware accelerator'
  zephyrproject-rtos#55899
  (2023-07-06T15:59:35Z)

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

MAINTAINERS.yml

@@ -3876,7 +3876,6 @@ Nuvoton NPCX Platforms:
   collaborators:
     - TomChang19
     - alvsun
-    - sjg20
     - keith-zephyr
     - fabiobaltieri
   files: