os: fix write_file

Author: medvednikov

vlib/os/os.v

@@ -566,13 +566,11 @@ pub fn expand_tilde_to_home(path string) string {
 // write_file writes `text` data to a file with the given `path`.
 // If `path` already exists, it will be overwritten.
 pub fn write_file(path string, text string) ! {
-	$if windows {
-		mut f := create(path)!
-		unsafe { f.write_full_buffer(text.str, usize(text.len))! }
+	mut f := create(path)!
+	defer {
 		f.close()
-	} $else {
-		write_file_direct(path, text)!
 	}
+	unsafe { f.write_full_buffer(text.str, usize(text.len))! }
 }
 
 pub struct ExecutableNotFoundError {