Fix clippy warnings.

Author: ehuss

crates/rustfix/examples/fix-json.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::disallowed_methods, clippy::print_stdout, clippy::print_stderr)]
+
 use anyhow::Error;
 use std::io::{stdin, BufReader, Read};
 use std::{collections::HashMap, collections::HashSet, env, fs};

crates/rustfix/tests/parse_and_replace.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::disallowed_methods, clippy::print_stdout, clippy::print_stderr)]
 #![cfg(not(windows))] // TODO: should fix these tests on Windows
 
 use anyhow::{anyhow, ensure, Context, Error};