Remove support for ArduinoCore-Primo. (#55)

The board is retired and the corresponding core (https://github.com/arduino/ArduinoCore-primo) has been archived. Considering that no one is going to maintain the low power code for nRF52/Primo its better to get rid of it alltogether (and no longer advertise compatibility to 'nrf52' which - imho rightfully - seems to confuse a lot of people.

Author: aentinger

.github/workflows/compile-examples.yml

@@ -69,11 +69,6 @@ jobs:
               - name: arduino:samd
             sketch-paths: |
               - examples/TianStandby
-          - fqbn: arduino:nrf52:primo
-            platforms: |
-              - name: arduino:nrf52
-            sketch-paths: |
-              - examples/PrimoDeepSleep
 
     steps:
       - name: Checkout repository

examples/PrimoDeepSleep/PrimoDeepSleep.ino

@@ -6,5 +6,5 @@ sentence=Power save primitives features for SAMD and nRF52 32bit boards
 paragraph=With this library you can manage the low power states of newer Arduino boards
 category=Device Control
 url=https://www.arduino.cc/libraries/ArduinoLowPower
-architectures=samd,nrf52
+architectures=samd
 depends=RTCZero