modules: shell: Remove power management handling

Remove power management handling and ping command from the
shell module. Power mgmt handling will be added to the
battery --> power module. And pong command is not needed anymore.
These changes removed the need of having a separate thread in the
shell module. Which saves some memory.

Signed-off-by: Simen S. Røstad <simen.rostad@nordicsemi.no>

Author: simensrostad

app/prj.conf

@@ -205,7 +205,7 @@ CONFIG_APP_LOG_LEVEL_DBG=y
 
 # Task Watchdog
 CONFIG_TASK_WDT=y
-CONFIG_TASK_WDT_CHANNELS=9
+CONFIG_TASK_WDT_CHANNELS=8
 CONFIG_TASK_WDT_MIN_TIMEOUT=10000
 
 # Device power management

app/src/modules/fota/fota.c

@@ -316,8 +316,10 @@ static void state_polling_for_update_entry(void *o)
 			SEND_FATAL_ERROR();
 		}
 		break;
+	case -ENOTRECOVERABLE:
+		__fallthrough;
 	case -ENETUNREACH:
-		LOG_WRN("Network is unreachable");
+		LOG_WRN("Failed to poll for a FOTA update, network is unreachable");
 		break;
 	case -ENOENT:
 		LOG_DBG("FOTA job finished, status reported to nRF Cloud");

app/src/modules/shell/Kconfig.shell

@@ -11,40 +11,10 @@ menuconfig APP_SHELL
 	imply AT_SHELL
 	default y
 	help
-	  Adds a zbus shell. The shell command is called
-	  "zbus" and will interpret arguments as zbus commands, and print back the
-	  response.
+	  Shell that adds usefaul commands to control certain aspects of the application.
 
 if APP_SHELL
 
-config APP_SHELL_THREAD_STACK_SIZE
-	int "Thread stack size"
-	default 1024
-
-config APP_SHELL_WATCHDOG_TIMEOUT_SECONDS
-	int "Watchdog timeout"
-	default 120
-	help
-	  Timeout in seconds for the shell module watchdog.
-	  The timeout given in this option covers both:
-	    * Waiting for an incoming message in zbus_sub_wait_msg().
-	    * Time spent processing the message, defined by
-	      CONFIG_APP_SHELL_MSG_PROCESSING_TIMEOUT_SECONDS.
-	  Ensure that this value exceeds CONFIG_APP_SHELL_MSG_PROCESSING_TIMEOUT_SECONDS.
-	  A small difference between the two can mean more frequent watchdog feeds, which increases
-	  power consumption.
-
-config APP_SHELL_MSG_PROCESSING_TIMEOUT_SECONDS
-	int "Maximum message processing time"
-	default 3
-	help
-	  Maximum time allowed for processing a single message in the module's state machine.
-	  The value must be smaller than CONFIG_APP_SHELL_WATCHDOG_TIMEOUT_SECONDS.
-
-config APP_SHELL_UART_PM_ENABLE
-	bool "Enable UART power management feature"
-	default y
-
 module = APP_SHELL
 module-str = SHELL
 source "subsys/logging/Kconfig.template.log_config"