MAINTAINERS: stm32: Remove inactive collaborators

@marwaiehm-st and @benothmn-st are not collaborating anymore
on those area.

Signed-off-by: Erwan Gouriou <erwan.gouriou@st.com>
diff --git a/MAINTAINERS.yml b/MAINTAINERS.yml
index d5bdf70..e973778 100644
--- a/MAINTAINERS.yml
+++ b/MAINTAINERS.yml
@@ -4495,7 +4495,6 @@
     - FRASTM
     - gautierg-st
     - GeorgeCGV
-    - marwaiehm-st
     - mathieuchopstm
     - djiatsaf-st
     - etienne-lms
@@ -5725,10 +5724,8 @@
   collaborators:
     - FRASTM
     - gautierg-st
-    - marwaiehm-st
     - asm5878
     - HoZHel
-    - benothmn-st
   files:
     - modules/Kconfig.stm32
   labels: