remove PDM example for RAK5010

Author: sabas1080

.github/workflows/compile-examples.yml

@@ -45,7 +45,7 @@ jobs:
             additional-sketch-paths: '"libraries/PDM" "libraries/ThreadDebug"'
           - board:
               fqbn: electroniccats:mbed:rak_wistrio5010
-            additional-sketch-paths: '"libraries/PDM" "libraries/ThreadDebug"'
+            additional-sketch-paths: '"libraries/ThreadDebug"'
 
     steps:
       - name: Checkout repository