compiler: do not emit rustfmt_skip inner attr, since it is unstable (#479)

cc tikv/raft-rs#390

Signed-off-by: Nick Cameron <[email protected]>

Author: nrc

compiler/src/codegen.rs

@@ -65,8 +65,6 @@ impl<'a> CodeWriter<'a> {
         self.write_line("#![allow(unknown_lints)]");
         self.write_line("#![allow(clippy::all)]");
         self.write_line("");
-        self.write_line("#![cfg_attr(rustfmt, rustfmt_skip)]");
-        self.write_line("");
         self.write_line("#![allow(box_pointers)]");
         self.write_line("#![allow(dead_code)]");
         self.write_line("#![allow(missing_docs)]");