Delete Deserializer impl from value::de::MapRefDeserializer

src/value/de.rs

@@ -1043,9 +1043,7 @@ impl<'de> VariantAccess<'de> for VariantRefDeserializer<'de> {
         V: Visitor<'de>,
     {
         match self.value {
-            Some(&Value::Object(ref v)) => {
-                serde::Deserializer::deserialize_any(MapRefDeserializer::new(v), visitor)
-            }
+            Some(&Value::Object(ref v)) => visitor.visit_map(MapRefDeserializer::new(v)),
             Some(other) => Err(serde::de::Error::invalid_type(
                 other.unexpected(),
                 &"struct variant",
@@ -1140,24 +1138,6 @@ impl<'de> MapAccess<'de> for MapRefDeserializer<'de> {
     }
 }
 
-impl<'de> serde::Deserializer<'de> for MapRefDeserializer<'de> {
-    type Error = Error;
-
-    #[inline]
-    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
-    where
-        V: Visitor<'de>,
-    {
-        visitor.visit_map(self)
-    }
-
-    forward_to_deserialize_any! {
-        bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
-        bytes byte_buf option unit unit_struct newtype_struct seq tuple
-        tuple_struct map struct enum identifier ignored_any
-    }
-}
-
 struct MapKeyDeserializer<'de> {
     key: Cow<'de, str>,
 }