Clippy fixes

src/animation.rs

@@ -26,7 +26,7 @@ impl<'a> Frames<'a> {
     }
 }
 
-impl<'a> Iterator for Frames<'a> {
+impl Iterator for Frames<'_> {
     type Item = ImageResult<Frame>;
     fn next(&mut self) -> Option<ImageResult<Frame>> {
         self.iterator.next()

src/codecs/bmp/encoder.rs

@@ -272,7 +272,7 @@ impl<'a, W: Write + 'a> BmpEncoder<'a, W> {
     }
 }
 
-impl<'a, W: Write> ImageEncoder for BmpEncoder<'a, W> {
+impl<W: Write> ImageEncoder for BmpEncoder<'_, W> {
     #[track_caller]
     fn write_image(
         mut self,

src/codecs/hdr/encoder.rs

@@ -140,7 +140,7 @@ impl<'a> RunIterator<'a> {
     }
 }
 
-impl<'a> Iterator for RunIterator<'a> {
+impl Iterator for RunIterator<'_> {
     type Item = RunOrNot;
 
     fn next(&mut self) -> Option<Self::Item> {
@@ -179,7 +179,7 @@ impl<'a> NorunCombineIterator<'a> {
 }
 
 // Combines sequential noruns produced by RunIterator
-impl<'a> Iterator for NorunCombineIterator<'a> {
+impl Iterator for NorunCombineIterator<'_> {
     type Item = RunOrNot;
     fn next(&mut self) -> Option<Self::Item> {
         loop {

src/codecs/pnm/encoder.rs

@@ -522,7 +522,7 @@ impl<'a> CheckedHeader<'a> {
 
 struct SampleWriter<'a>(&'a mut dyn Write);
 
-impl<'a> SampleWriter<'a> {
+impl SampleWriter<'_> {
     fn write_samples_ascii<V>(self, samples: V) -> io::Result<()>
     where
         V: Iterator,
@@ -633,7 +633,7 @@ impl<'a> From<&'a [u16]> for FlatSamples<'a> {
     }
 }
 
-impl<'a> TupleEncoding<'a> {
+impl TupleEncoding<'_> {
     fn write_image(&self, writer: &mut dyn Write) -> ImageResult<()> {
         match *self {
             TupleEncoding::PbmBits {

src/codecs/pnm/header.rs

@@ -304,7 +304,7 @@ impl PnmHeader {
                 ..
             } => {
                 struct TupltypeWriter<'a>(&'a Option<ArbitraryTuplType>);
-                impl<'a> fmt::Display for TupltypeWriter<'a> {
+                impl fmt::Display for TupltypeWriter<'_> {
                     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                         match self.0 {
                             Some(tt) => writeln!(f, "TUPLTYPE {}", tt.name()),

src/image.rs

@@ -799,7 +799,7 @@ pub struct Pixels<'a, I: ?Sized + 'a> {
     height: u32,
 }
 
-impl<'a, I: GenericImageView> Iterator for Pixels<'a, I> {
+impl<I: GenericImageView> Iterator for Pixels<'_, I> {
     type Item = (u32, u32, I::Pixel);
 
     fn next(&mut self) -> Option<(u32, u32, I::Pixel)> {