Fix warnings (#225)

src/decoder/ifd.rs

@@ -1,7 +1,6 @@
 //! Function for reading TIFF tags
 
 use std::collections::HashMap;
-use std::convert::{TryFrom, TryInto};
 use std::io::{self, Read, Seek};
 use std::mem;
 use std::str;

src/decoder/image.rs

@@ -7,7 +7,6 @@ use crate::tags::{
     CompressionMethod, PhotometricInterpretation, PlanarConfiguration, Predictor, SampleFormat, Tag,
 };
 use crate::{ColorType, TiffError, TiffFormatError, TiffResult, TiffUnsupportedError, UsageError};
-use std::convert::TryFrom;
 use std::io::{self, Cursor, Read, Seek};
 use std::sync::Arc;
 

src/decoder/mod.rs

@@ -1,5 +1,4 @@
 use std::collections::{HashMap, HashSet};
-use std::convert::TryFrom;
 use std::io::{self, Read, Seek};
 use std::ops::Range;
 

src/decoder/stream.rs

@@ -1,6 +1,5 @@
 //! All IO functionality needed for TIFF decoding
 
-use std::convert::TryFrom;
 use std::io::{self, BufRead, BufReader, Read, Seek, Take};
 
 /// Byte order of the TIFF file.

src/decoder/tag_reader.rs

@@ -1,4 +1,3 @@
-use std::convert::TryFrom;
 use std::io::{Read, Seek};
 
 use crate::tags::Tag;

src/encoder/compression/deflate.rs

@@ -1,6 +1,5 @@
-use crate::{encoder::compression::*, tags::CompressionMethod};
+use crate::encoder::compression::*;
 use flate2::{write::ZlibEncoder, Compression as FlateCompression};
-use std::io::Write;
 
 /// The Deflate algorithm used to compress image data in TIFF files.
 #[derive(Debug, Clone, Copy)]

src/encoder/compression/lzw.rs

@@ -1,5 +1,4 @@
-use crate::{encoder::compression::*, tags::CompressionMethod};
+use crate::encoder::compression::*;
-use std::io::Write;
 use weezl::encode::Encoder as LZWEncoder;
 
 /// The LZW algorithm used to compress image data in TIFF files.

src/encoder/compression/packbits.rs

@@ -1,5 +1,5 @@
-use crate::{encoder::compression::*, tags::CompressionMethod};
+use crate::encoder::compression::*;
-use std::io::{BufWriter, Error, ErrorKind, Write};
+use std::io::{BufWriter, Error, ErrorKind};
 
 /// Compressor that uses the Packbits[^note] algorithm to compress bytes.
 ///

src/encoder/compression/uncompressed.rs

@@ -1,5 +1,4 @@
-use crate::{encoder::compression::*, tags::CompressionMethod};
+use crate::encoder::compression::*;
-use std::io::Write;
 
 /// The default algorithm which does not compress at all.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]

src/encoder/mod.rs

@@ -3,7 +3,6 @@ pub use tiff_value::*;
 use std::{
     cmp,
     collections::BTreeMap,
-    convert::{TryFrom, TryInto},
     io::{self, Seek, Write},
     marker::PhantomData,
     mem,