drop imports already in 2021 prelude

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

perlmod-macro/src/attribs.rs

@@ -1,5 +1,3 @@
-use std::convert::TryFrom;
-
 use proc_macro2::{Ident, Span};
 
 use syn::AttributeArgs;

perlmod-macro/src/lib.rs

@@ -6,7 +6,6 @@ extern crate proc_macro;
 extern crate proc_macro2;
 
 use std::cell::RefCell;
-use std::convert::TryFrom;
 
 use proc_macro::TokenStream as TokenStream_1;
 use proc_macro2::TokenStream;

perlmod-macro/src/module.rs

@@ -1,6 +1,3 @@
-use std::convert::TryFrom;
-use std::iter::IntoIterator;
-
 use proc_macro2::TokenStream;
 
 use quote::quote;

perlmod-macro/src/package.rs

@@ -1,4 +1,3 @@
-use std::convert::TryFrom;
 use std::env;
 
 use proc_macro2::{Ident, Span, TokenStream};

perlmod-test/src/bless.rs

@@ -1,7 +1,5 @@
 #[perlmod::package(name = "RSPM::Bless", lib = "perlmod_test")]
 mod export {
-    use std::convert::TryFrom;
-
     use anyhow::Error;
 
     use perlmod::Value;

perlmod/src/array.rs

@@ -1,6 +1,5 @@
 //! Module dealing with perl [`Array`](crate::Array)s. ([`AV`](crate::ffi::AV) pointers).
 
-use std::convert::TryFrom;
 use std::marker::PhantomData;
 
 use crate::error::CastError;

perlmod/src/hash.rs

@@ -1,7 +1,5 @@
 //! Module dealing with perl [`Hash`](crate::Hash)es. ([`HV`](crate::ffi::HV) pointers).
 
-use std::convert::TryFrom;
-
 use crate::error::CastError;
 use crate::ffi::{self, HV, SV};
 use crate::raw_value;

perlmod/src/scalar.rs

@@ -1,6 +1,5 @@
 //! Module containing the [`Scalar`] and [`Mortal`] types.
 
-use std::convert::TryInto;
 use std::marker::PhantomData;
 use std::mem;
 

perlmod/src/value.rs

@@ -317,7 +317,6 @@ impl Value {
     /// ```
     /// #[perlmod::package(name = "My::Thing")]
     /// mod export {
-    ///     use std::convert::TryFrom;
     ///     use std::sync::Mutex;
     ///
     ///     use perlmod::{Error, Value};