Remove leftover Ok(())

src/shims/unix/fd.rs

@@ -172,8 +172,7 @@ impl FileDescription for io::Stdout {
         // the host -- there is no good in adding extra buffering
         // here.
         io::stdout().flush().unwrap();
-        ecx.return_written_byte_count_or_error(result, dest)?;
-        Ok(())
+        ecx.return_written_byte_count_or_error(result, dest)
     }
 
     fn is_tty(&self, communicate_allowed: bool) -> bool {
@@ -197,8 +196,7 @@ impl FileDescription for io::Stderr {
         // We allow writing to stderr even with isolation enabled.
         // No need to flush, stderr is not buffered.
         let result = Write::write(&mut { self }, bytes);
-        ecx.return_written_byte_count_or_error(result, dest)?;
-        Ok(())
+        ecx.return_written_byte_count_or_error(result, dest)
     }
 
     fn is_tty(&self, communicate_allowed: bool) -> bool {
@@ -225,8 +223,7 @@ impl FileDescription for NullOutput {
     ) -> InterpResult<'tcx> {
         // We just don't write anything, but report to the user that we did.
         let result = Ok(bytes.len());
-        ecx.return_written_byte_count_or_error(result, dest)?;
-        Ok(())
+        ecx.return_written_byte_count_or_error(result, dest)
     }
 }