clang-tidy remove redundant

src/drivers/gps/gps.cpp

@@ -1036,7 +1036,6 @@ void
 reset()
 {
 	PX4_ERR("GPS reset not supported");
-	return;
 }
 
 /**
@@ -1056,7 +1055,6 @@ info()
 		g_dev[1]->print_info();
 	}
 
-	return;
 }
 
 void print_usage()

src/examples/ekf_att_pos_estimator/ekf_att_pos_estimator_main.cpp

@@ -740,7 +740,6 @@ void AttitudePositionEstimatorEKF::task_main()
 	_task_running = false;
 
 	_estimator_task = -1;
-	return;
 }
 
 void AttitudePositionEstimatorEKF::initReferencePosition(hrt_abstime timestamp,

src/modules/mc_att_control/mc_att_control_main.cpp

@@ -1357,7 +1357,6 @@ MulticopterAttitudeControl::task_main()
 	}
 
 	_control_task = -1;
-	return;
 }
 
 int

src/modules/navigator/navigator_main.cpp

@@ -695,7 +695,6 @@ Navigator::task_main()
 	PX4_INFO("exiting");
 
 	_navigator_task = -1;
-	return;
 }
 
 int

src/modules/position_estimator_inav/position_estimator_inav_main.cpp

@@ -119,7 +119,6 @@ static void usage(const char *reason)
 	}
 
 	PX4_INFO("usage: position_estimator_inav {start|stop|status} [-v]\n");
-	return;
 }
 
 /**

src/modules/sdlog2/sdlog2.c

@@ -493,7 +493,6 @@ int create_log_dir()
 
 			/* dir exists already */
 			dir_number++;
-			continue;
 		}
 
 		if (dir_number >= MAX_NO_LOGFOLDER) {

src/modules/systemlib/pwm_limit/pwm_limit.c

@@ -52,7 +52,6 @@ void pwm_limit_init(pwm_limit_t *limit)
 {
 	limit->state = PWM_LIMIT_STATE_INIT;
 	limit->time_armed = 0;
-	return;
 }
 
 void pwm_limit_calc(const bool armed, const bool pre_armed, const unsigned num_channels, const uint16_t reverse_mask,
@@ -225,5 +224,4 @@ void pwm_limit_calc(const bool armed, const bool pre_armed, const unsigned num_c
 		break;
 	}
 
-	return;
 }

src/modules/vtol_att_control/vtol_att_control_main.cpp

@@ -836,7 +836,6 @@ void VtolAttitudeControl::task_main()
 
 	warnx("exit");
 	_control_task = -1;
-	return;
 }
 
 int

src/platforms/posix/drivers/gpssim/gpssim.cpp

@@ -375,7 +375,6 @@ GPSSIM::task_main()
 
 	/* tell the dtor that we are exiting */
 	_task = -1;
-	return;
 }
 
 

src/platforms/posix/drivers/tonealrmsim/tone_alarm.cpp

@@ -594,7 +594,6 @@ tune_end:
 		_default_tune_number = 0;
 	}
 
-	return;
 }
 
 int

src/platforms/posix/main.cpp

@@ -317,10 +317,10 @@ int main(int argc, char **argv)
 	set_cpu_scaling();
 
 	int index = 1;
-	string  commands_file = "";
+	string  commands_file;
 	int positional_arg_count = 0;
-	string data_path = "";
-	string node_name = "";
+	string data_path;
+	string node_name;
 
 	// parse arguments
 	while (index < argc) {
@@ -501,7 +501,7 @@ int main(int argc, char **argv)
 	}
 
 	if (!daemon_mode) {
-		string mystr = "";
+		string mystr;
 		string string_buffer[CMD_BUFF_SIZE];
 		int buf_ptr_write = 0;
 		int buf_ptr_read = 0;