Fix warnings from clippy with 'cargo clippy --fix'

src/de/enum_.rs

@@ -12,7 +12,7 @@ impl<'a, 'b, 's> UnitVariantAccess<'a, 'b, 's> {
     }
 }
 
-impl<'a, 'de, 's> de::EnumAccess<'de> for UnitVariantAccess<'a, 'de, 's> {
+impl<'de> de::EnumAccess<'de> for UnitVariantAccess<'_, 'de, '_> {
     type Error = Error;
     type Variant = Self;
 
@@ -64,7 +64,7 @@ impl<'a, 'b, 's> VariantAccess<'a, 'b, 's> {
     }
 }
 
-impl<'a, 'de, 's> de::EnumAccess<'de> for VariantAccess<'a, 'de, 's> {
+impl<'de> de::EnumAccess<'de> for VariantAccess<'_, 'de, '_> {
     type Error = Error;
     type Variant = Self;
 

src/de/map.rs

@@ -13,7 +13,7 @@ impl<'a, 'b, 's> MapAccess<'a, 'b, 's> {
     }
 }
 
-impl<'a, 'de, 's> de::MapAccess<'de> for MapAccess<'a, 'de, 's> {
+impl<'de> de::MapAccess<'de> for MapAccess<'_, 'de, '_> {
     type Error = Error;
 
     fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>

src/de/mod.rs

@@ -381,7 +381,7 @@ macro_rules! deserialize_fromstr {
     }};
 }
 
-impl<'a, 'de, 's> de::Deserializer<'de> for &'a mut Deserializer<'de, 's> {
+impl<'de> de::Deserializer<'de> for &mut Deserializer<'de, '_> {
     type Error = Error;
 
     /// Unsupported. Can’t parse a value without knowing its expected type.
@@ -608,7 +608,7 @@ impl<'a, 'de, 's> de::Deserializer<'de> for &'a mut Deserializer<'de, 's> {
 
             struct EscapedStringDeserializer<'a, 'de, 's>(&'a mut Deserializer<'de, 's>);
 
-            impl<'a, 'de, 's> serde::Deserializer<'de> for EscapedStringDeserializer<'a, 'de, 's> {
+            impl<'de> serde::Deserializer<'de> for EscapedStringDeserializer<'_, 'de, '_> {
                 type Error = Error;
 
                 fn deserialize_any<V>(self, visitor: V) -> Result<V::Value>

src/de/seq.rs

@@ -13,7 +13,7 @@ impl<'a, 'b, 's> SeqAccess<'a, 'b, 's> {
     }
 }
 
-impl<'a, 'de, 's> de::SeqAccess<'de> for SeqAccess<'a, 'de, 's> {
+impl<'de> de::SeqAccess<'de> for SeqAccess<'_, 'de, '_> {
     type Error = Error;
 
     fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>

src/ser/mod.rs

@@ -651,7 +651,7 @@ impl<'a, 'b> StringCollector<'a, 'b> {
     }
 }
 
-impl<'a, 'b> fmt::Write for StringCollector<'a, 'b> {
+impl fmt::Write for StringCollector<'_, '_> {
     fn write_str(&mut self, s: &str) -> fmt::Result {
         self.do_write_str(s).or(Err(fmt::Error))
     }