Revert "nats: De/Ser using sample_freq instead of sample_frequency"

This reverts commit f2b24ca.

nats/src/jetstream/types.rs

@@ -224,12 +224,7 @@ pub struct ConsumerConfig {
     #[serde(default, skip_serializing_if = "is_default")]
     pub rate_limit: u64,
     /// What percentage of acknowledgments should be samples for observability, 0-100
-    #[serde(
-        rename = "sample_freq",
-        with = "from_str",
-        default,
-        skip_serializing_if = "is_default"
-    )]
+    #[serde(default, skip_serializing_if = "is_default")]
     pub sample_frequency: u8,
     /// The maximum number of waiting consumers.
     #[serde(default, skip_serializing_if = "is_default")]
@@ -259,26 +254,6 @@ pub struct ConsumerConfig {
     pub inactive_threshold: Duration,
 }
 
-mod from_str {
-    pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
-    where
-        T: std::str::FromStr,
-        T::Err: std::fmt::Display,
-        D: serde::Deserializer<'de>,
-    {
-        let s = <String as serde::Deserialize>::deserialize(deserializer)?;
-        T::from_str(&s).map_err(serde::de::Error::custom)
-    }
-
-    pub fn serialize<T, S>(value: &T, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        T: std::fmt::Display,
-        S: serde::Serializer,
-    {
-        serializer.serialize_str(&value.to_string())
-    }
-}
-
 pub(crate) enum ConsumerKind {
     Pull,
 }