ab boards power+gnd checked against schematics

src/en/overlay/ab-adc-pi-zero.md

@@ -17,10 +17,8 @@ power:
   '2':
 ground:
   '6':
-  '9':
   '14':
   '20':
-  '25':
   '30':
   '34':
   '39':

src/en/overlay/ab-serial-pi-plus.md

@@ -16,7 +16,6 @@ power:
   '1':
 ground:
   '6':
-  '9':
   '14':
   '20':
   '25':

src/en/overlay/ab-serial-pi-zero.md

@@ -16,7 +16,6 @@ power:
   '1':
 ground:
   '6':
-  '9':
   '14':
   '20':
   '25':

src/en/overlay/ab-servo-pwm-pi-zero.md

@@ -17,17 +17,14 @@ power:
   '2':
 ground:
   '6':
-  '9':
   '14':
   '20':
-  '25':
   '30':
-  '34':
   '39':
 pin:
   '3':
     mode: i2c
-  '4':
+  '7':
     mode: gpio
   '5':
     mode: i2c