MAINTAINERS: remove my assignments

I won't be supporting Zephyr for the foreseeable future, so remove my
association with specific subsystems.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>

MAINTAINERS.yml

@@ -575,9 +575,7 @@ Documentation:
         - "area: HWINFO"
 
 "Drivers: I2C":
-    status: maintained
-    maintainers:
-        - pabigot
+    status: orphaned
     files:
         - drivers/i2c/
         - dts/bindings/i2c/
@@ -871,7 +869,6 @@ Filesystems:
         - de-nordic
         - Laczen
         - nashif
-        - pabigot
         - vanwinkeljan
     files:
         - include/fs/
@@ -910,7 +907,6 @@ Kernel:
         - nashif
         - ceolin
         - dcpleung
-        - pabigot
     files:
         - doc/reference/kernel/
         - include/kernel*.h
@@ -934,9 +930,7 @@ Base OS:
         - "area: Base OS"
 
 Little FS:
-    status: maintained
-    maintainers:
-        - pabigot
+    status: orphaned
     files:
         - subsys/fs/Kconfig.littlefs
         - subsys/fs/littlefs_fs.c
@@ -1141,7 +1135,6 @@ Power management:
         - ceolin
     collaborators:
         - nashif
-        - pabigot
         - mengxianglinx
     files:
         - include/power/power.h