remove as_str() legacy wrappers, callers use .into() directly

hive-sh4re/src/approvals.rs

@@ -71,17 +71,6 @@ pub enum ApprovalKind {
     MergeConfigPr,
 }
 
-impl ApprovalKind {
-    /// Wire/UI string — the same value serde's `snake_case` rename
-    /// produces, via the same derive (`#[strum(serialize_all =
-    /// "snake_case")]`) rather than a hand-rolled match a new variant
-    /// could silently miss.
-    #[must_use]
-    pub fn as_str(self) -> &'static str {
-        self.into()
-    }
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
 #[serde(rename_all = "snake_case")]
 pub enum ApprovalStatus {