delete module's redundant print_status()

- we can already get the running status from ModuleBase and the other misc information is already available through perf or uORB

src/modules/rc_update/rc_update.cpp

@@ -511,15 +511,6 @@ RCUpdate::task_spawn(int argc, char *argv[])
 	return PX4_ERROR;
 }
 
-int
-RCUpdate::print_status()
-{
-	PX4_INFO("Running");
-	perf_print_counter(_loop_perf);
-
-	return 0;
-}
-
 int
 RCUpdate::custom_command(int argc, char *argv[])
 {

src/modules/rc_update/rc_update.h

@@ -87,9 +87,6 @@ public:
 	void Run() override;
 	bool init();
 
-	/** @see ModuleBase::print_status() */
-	int print_status() override;
-
 private:
 
 	/**