remove attributes with the None value

packages/native-core/src/node.rs

@@ -80,7 +80,6 @@ pub enum OwnedAttributeValue<V: FromAnyValue = ()> {
     Int(i64),
     Bool(bool),
     Custom(V),
-    None,
 }
 
 pub trait FromAnyValue {
@@ -99,7 +98,6 @@ impl<V: FromAnyValue> Debug for OwnedAttributeValue<V> {
             Self::Int(arg0) => f.debug_tuple("Int").field(arg0).finish(),
             Self::Bool(arg0) => f.debug_tuple("Bool").field(arg0).finish(),
             Self::Custom(_) => f.debug_tuple("Any").finish(),
-            Self::None => write!(f, "None"),
         }
     }
 }
@@ -112,7 +110,7 @@ impl<V: FromAnyValue> From<BorrowedAttributeValue<'_>> for OwnedAttributeValue<V
             BorrowedAttributeValue::Int(int) => Self::Int(int),
             BorrowedAttributeValue::Bool(bool) => Self::Bool(bool),
             BorrowedAttributeValue::Any(any) => Self::Custom(V::from_any_value(&*any)),
-            BorrowedAttributeValue::None => Self::None,
+            BorrowedAttributeValue::None => panic!("None attribute values result in removing the attribute, not converting it to a None value.")
         }
     }
 }
@@ -146,13 +144,6 @@ impl<V: FromAnyValue> OwnedAttributeValue<V> {
         }
     }
 
-    pub fn as_none(&self) -> Option<()> {
-        match self {
-            OwnedAttributeValue::None => Some(()),
-            _ => None,
-        }
-    }
-
     pub fn as_custom(&self) -> Option<&V> {
         match self {
             OwnedAttributeValue::Custom(custom) => Some(custom),