Remove trait imports that are in the 2021 edition prelude

src/format.rs

@@ -5,7 +5,6 @@ use age_core::{
 };
 use p256::{ecdh::EphemeralSecret, elliptic_curve::sec1::ToEncodedPoint};
 use rand::rngs::OsRng;
-use std::convert::TryInto;
 
 use crate::{p256::Recipient, STANZA_TAG};
 

src/key.rs

@@ -9,7 +9,6 @@ use age_plugin::{identity, Callbacks};
 use bech32::{ToBase32, Variant};
 use dialoguer::Password;
 use log::warn;
-use std::convert::TryInto;
 use std::fmt;
 use std::io;
 use std::iter;

src/main.rs

@@ -1,4 +1,3 @@
-use std::convert::{TryFrom, TryInto};
 use std::fs::{File, OpenOptions};
 use std::io::{self, Write};
 

src/p256.rs

@@ -1,7 +1,6 @@
 use bech32::{ToBase32, Variant};
 use p256::elliptic_curve::sec1::{FromEncodedPoint, ToEncodedPoint};
 use sha2::{Digest, Sha256};
-use std::convert::TryInto;
 use std::fmt;
 
 use crate::RECIPIENT_PREFIX;