Using remove on a file that does not exist will result in a exception that is not clear what the issue is, example below:

import std.file;

void main() {
   remove("IDontExist.txt");
}


std.file.FileException: In std\file.d(400), data file IDontExist.txt: The operation completed successfully.

The FileException states the "operation completed successfully" this is not actually the case since there was nothing to remove.

Even though it had nothing to remove I think it is reasonable to consider the operation successful at which point it shouldn't be throwing an Exception.