MAINTAINERS: remove povergoing due to inactivity

Last activity: 22 months ago (review)

Recent activities:

- review: Review on 'arm64: smp: Fix cache operations in the SMP'
  #66647
  (2024-01-29T07:37:19Z)
- review: Review on 'tz: Remove unused trustzone driver'
  #66224
  (2023-12-07T06:31:24Z)
- review: Review on ' arch: arm: cortex_m: Move default configs to a file
  and add consistency checks '
  #64978
  (2023-12-05T06:06:35Z)

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

MAINTAINERS.yml

@@ -266,7 +266,6 @@ ARM64 arch:
   status: odd fixes
   collaborators:
     - npitre
-    - povergoing
     - sgrrzhf
     - wearyzen
     - ithinuel
@@ -5485,8 +5484,6 @@ West:
   status: maintained
   maintainers:
     - stephanosio
-  collaborators:
-    - povergoing
   files:
     - modules/cmsis/
   labels: