Fix breakage due to rust-lang/rust#57755

Author: Michael Wright

clippy_lints/src/write.rs

@@ -5,7 +5,7 @@ use rustc_errors::Applicability;
 use std::borrow::Cow;
 use syntax::ast::*;
 use syntax::parse::{parser, token};
-use syntax::tokenstream::{ThinTokenStream, TokenStream};
+use syntax::tokenstream::TokenStream;
 
 /// **What it does:** This lint warns when you use `println!("")` to
 /// print a newline.
@@ -261,9 +261,9 @@ impl EarlyLintPass for Pass {
 /// ```rust,ignore
 /// (Some("string to write: {}"), Some(buf))
 /// ```
-fn check_tts<'a>(cx: &EarlyContext<'a>, tts: &ThinTokenStream, is_write: bool) -> (Option<String>, Option<Expr>) {
+fn check_tts<'a>(cx: &EarlyContext<'a>, tts: &TokenStream, is_write: bool) -> (Option<String>, Option<Expr>) {
     use fmt_macros::*;
-    let tts = TokenStream::from(tts.clone());
+    let tts = tts.clone();
     let mut parser = parser::Parser::new(&cx.sess.parse_sess, tts, None, false, false);
     let mut expr: Option<Expr> = None;
     if is_write {