:sig
void file_unlink(String file_name)

:params
file_name : file to delete, resolved against the unit's directory
return value : none

:content
Deletes a file. Deleting a path that does not exist is a no-op, so it is safe to call before recreating a file.

:example
file_put_contents("/tmp/doc-unlink.txt", "x");
file_unlink("/tmp/doc-unlink.txt");
print(file_exists("/tmp/doc-unlink.txt") ? "exists" : "gone", "\n");

:see
>sys
file_exists
dir_remove