clang-tidy remove redundant

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;