print_load: Removed unused variable to fix compilation on macos

platforms/posix/src/px4/common/print_load.cpp

@@ -116,7 +116,6 @@ void print_load(int fd, struct print_load_s *print_state)
 	mach_msg_type_number_t thread_info_count;
 
 	thread_basic_info_t basic_info_th;
-	uint32_t stat_thread = 0;
 
 	// get all threads of the PX4 main task
 	kr = task_threads(task_handle, &thread_list, &th_cnt);
@@ -126,10 +125,6 @@ void print_load(int fd, struct print_load_s *print_state)
 		return;
 	}
 
-	if (th_cnt > 0) {
-		stat_thread += th_cnt;
-	}
-
 	long tot_sec = 0;
 	long tot_usec = 0;
 	long tot_cpu = 0;