Remove unnecessary imports in x11rb

TryFrom, TryInto, and drop are all part of the prelude in Rust 2021.

Signed-off-by: Uli Schlachter <[email protected]>

x11rb/src/connection/mod.rs

@@ -3,7 +3,6 @@
 //! This module contains the `Connection` trait and related definitions. The code in this module is
 //! used by each concrete implementation of the X11 protocol.
 
-use std::convert::{TryFrom, TryInto};
 use std::io::IoSlice;
 
 use x11rb_protocol::x11_utils::{ReplyFDsRequest, ReplyRequest, VoidRequest};

x11rb/src/cursor/parse_cursor.rs

@@ -4,7 +4,6 @@
 //   Copyright © 2013 Michael Stapelberg
 // and is covered by MIT/X Consortium License
 
-use std::convert::TryInto;
 use std::io::{Read, Seek, SeekFrom};
 
 const FILE_MAGIC: u32 = 0x7275_6358;

x11rb/src/image.rs

@@ -25,7 +25,6 @@
 //   begins with the second bit of each pixel etc.
 
 use std::borrow::Cow;
-use std::convert::{TryFrom, TryInto};
 
 use crate::connection::Connection;
 use crate::cookie::VoidCookie;

x11rb/src/properties.rs

@@ -1,7 +1,5 @@
 //! Utility functions for working with X11 properties
 
-use std::convert::TryInto;
-
 use crate::connection::RequestConnection;
 use crate::cookie::{Cookie, VoidCookie};
 use crate::errors::{ConnectionError, ParseError, ReplyError};

x11rb/src/rust_connection/mod.rs

@@ -1,8 +1,6 @@
 //! A pure-rust implementation of a connection to an X11 server.
 
-use std::convert::TryInto;
 use std::io::IoSlice;
-use std::mem::drop;
 use std::sync::{Condvar, Mutex, MutexGuard, TryLockError};
 use std::time::Instant;
 

x11rb/src/wrapper.rs

@@ -1,7 +1,5 @@
 //! Some wrappers around the generated code to simplify use.
 
-use std::convert::TryInto;
-
 use super::cookie::VoidCookie;
 use super::errors::{ConnectionError, ReplyError};
 use super::protocol::xproto::{Atom, ConnectionExt as XProtoConnectionExt, PropMode, Window};

x11rb/src/xcb_ffi/mod.rs

@@ -2,7 +2,6 @@
 //!
 //! This module is only available when the `allow-unsafe-code` feature is enabled.
 
-use std::convert::TryInto;
 use std::ffi::CStr;
 use std::io::{Error as IOError, ErrorKind, IoSlice};
 use std::os::raw::c_int;