Resolve clippy warnings

Author: wesleywiser

test/sys/test_aio.rs

@@ -1,5 +1,5 @@
 use std::{
-    io::{Read, Seek, SeekFrom, Write},
+    io::{Read, Seek, Write},
     ops::Deref,
     os::unix::io::AsRawFd,
     pin::Pin,
@@ -371,7 +371,7 @@ mod aio_write {
         assert_eq!(err, Ok(()));
         assert_eq!(aiow.as_mut().aio_return().unwrap(), wbuf.len());
 
-        f.seek(SeekFrom::Start(0)).unwrap();
+        f.rewind().unwrap();
         let len = f.read_to_end(&mut rbuf).unwrap();
         assert_eq!(len, EXPECT.len());
         assert_eq!(rbuf, EXPECT);
@@ -402,7 +402,7 @@ mod aio_write {
         assert_eq!(err, Ok(()));
         assert_eq!(aiow.as_mut().aio_return().unwrap(), wbuf.len());
 
-        f.seek(SeekFrom::Start(0)).unwrap();
+        f.rewind().unwrap();
         let len = f.read_to_end(&mut rbuf).unwrap();
         assert_eq!(len, EXPECT.len());
         assert_eq!(rbuf, EXPECT);
@@ -537,7 +537,7 @@ fn sigev_signal() {
     }
 
     assert_eq!(aiow.as_mut().aio_return().unwrap(), WBUF.len());
-    f.seek(SeekFrom::Start(0)).unwrap();
+    f.rewind().unwrap();
     let len = f.read_to_end(&mut rbuf).unwrap();
     assert_eq!(len, EXPECT.len());
     assert_eq!(rbuf, EXPECT);

test/test_fcntl.rs

@@ -231,7 +231,7 @@ fn test_readlink() {
 mod linux_android {
     use libc::loff_t;
     use std::io::prelude::*;
-    use std::io::{IoSlice, SeekFrom};
+    use std::io::IoSlice;
     use std::os::unix::prelude::*;
 
     use nix::fcntl::*;
@@ -272,7 +272,7 @@ mod linux_android {
         .unwrap();
 
         let mut res: String = String::new();
-        tmp2.seek(SeekFrom::Start(0)).unwrap();
+        tmp2.rewind().unwrap();
         tmp2.read_to_string(&mut res).unwrap();
 
         assert_eq!(res, String::from("bar"));