try to reduce bajillion warnings

2 files changed, 7 insertions, 8 deletions

diff --git a/src/libstd/io/buffered.rs b/src/libstd/io/buffered.rs
index e9a8dbb4098..9ef31978236 100644
--- a/src/libstd/io/buffered.rs
+++ b/src/libstd/io/buffered.rs
@@ -497,7 +497,6 @@ mod tests {
         assert_eq!(*writer.get_ref(), [0, 1, 2, 3, 4, 5, 6, 7, 8]);
 
         writer.write(&[9, 10, 11]).unwrap();
-        let a: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];
         assert_eq!(*writer.get_ref(), [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]);
 
         writer.flush().unwrap();
@@ -593,7 +592,7 @@ mod tests {
     #[test]
     fn test_lines() {
         let in_buf = b"a\nb\nc";
-        let mut reader = BufReader::with_capacity(2, in_buf);
+        let reader = BufReader::with_capacity(2, in_buf);
         let mut it = reader.lines();
         assert_eq!(it.next(), Some(Ok("a".to_string())));
         assert_eq!(it.next(), Some(Ok("b".to_string())));
@@ -618,14 +617,14 @@ mod tests {
     #[test]
     fn read_char_buffered() {
         let buf = [195u8, 159u8];
-        let mut reader = BufReader::with_capacity(1, &buf[..]);
+        let reader = BufReader::with_capacity(1, &buf[..]);
         assert_eq!(reader.chars().next(), Some(Ok('ß')));
     }
 
     #[test]
     fn test_chars() {
         let buf = [195u8, 159u8, b'a'];
-        let mut reader = BufReader::with_capacity(1, &buf[..]);
+        let reader = BufReader::with_capacity(1, &buf[..]);
         let mut it = reader.chars();
         assert_eq!(it.next(), Some(Ok('ß')));
         assert_eq!(it.next(), Some(Ok('a')));
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index c38d52161c9..8ec0e4fe4e4 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -869,12 +869,12 @@ mod tests {
 
     #[test]
     fn split() {
-        let mut buf = Cursor::new(b"12");
+        let buf = Cursor::new(b"12");
         let mut s = buf.split(b'3');
         assert_eq!(s.next(), Some(Ok(vec![b'1', b'2'])));
         assert_eq!(s.next(), None);
 
-        let mut buf = Cursor::new(b"1233");
+        let buf = Cursor::new(b"1233");
         let mut s = buf.split(b'3');
         assert_eq!(s.next(), Some(Ok(vec![b'1', b'2'])));
         assert_eq!(s.next(), Some(Ok(vec![])));
@@ -902,12 +902,12 @@ mod tests {
 
     #[test]
     fn lines() {
-        let mut buf = Cursor::new(b"12");
+        let buf = Cursor::new(b"12");
         let mut s = buf.lines();
         assert_eq!(s.next(), Some(Ok("12".to_string())));
         assert_eq!(s.next(), None);
 
-        let mut buf = Cursor::new(b"12\n\n");
+        let buf = Cursor::new(b"12\n\n");
         let mut s = buf.lines();
         assert_eq!(s.next(), Some(Ok("12".to_string())));
         assert_eq!(s.next(), Some(Ok(String::new())));