refactor: move env/osstr imports to avoid warnings

Author: calebcartwright

Diff for: config_proc_macro/src/utils.rs

@@ -1,7 +1,5 @@
 use proc_macro2::TokenStream;
 use quote::{quote, ToTokens};
-use std::env;
-use std::ffi::OsStr;
 
 pub fn fold_quote<F, I, T>(input: impl Iterator<Item = I>, f: F) -> TokenStream
 where
@@ -26,6 +24,8 @@ pub fn is_unit(v: &syn::Variant) -> bool {
 pub fn debug_with_rustfmt(input: &TokenStream) {
     use std::io::Write;
     use std::process::{Command, Stdio};
+    use std::env;
+    use std::ffi::OsStr;
 
     let rustfmt_var = env::var_os("RUSTFMT");
     let rustfmt = match &rustfmt_var {