update MSRV to 1.65 (#3059)

actix-http/src/header/shared/content_encoding.rs

@@ -1,4 +1,4 @@
-use std::{convert::TryFrom, str::FromStr};
+use std::str::FromStr;
 
 use derive_more::{Display, Error};
 use http::header::InvalidHeaderValue;

actix-http/src/header/shared/quality.rs

@@ -1,7 +1,4 @@
-use std::{
-    convert::{TryFrom, TryInto},
-    fmt,
-};
+use std::fmt;
 
 use derive_more::{Display, Error};
 

actix-http/src/header/shared/quality_item.rs

@@ -1,4 +1,4 @@
-use std::{cmp, convert::TryFrom as _, fmt, str};
+use std::{cmp, fmt, str};
 
 use crate::error::ParseError;