Drop CONFIG_SHOW_ACTIVITY

This feature is not enabled by any board. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>

common/cli_readline.c

@@ -569,12 +569,6 @@ int cli_readline_into_buffer(const char *const prompt, char *buffer,
 			return -2;	/* timed out */
 		WATCHDOG_RESET();	/* Trigger watchdog, if needed */
 
-#ifdef CONFIG_SHOW_ACTIVITY
-		while (!tstc()) {
-			show_activity(0);
-			WATCHDOG_RESET();
-		}
-#endif
 		c = getc();
 
 		/*