refactor(core): trim policy result API

crates/arr-core/src/policy.rs

@@ -51,15 +51,6 @@ pub struct EvaluationContext<'a> {
     pub candidate: Candidate<'a>,
 }
 
-/// A rule's result before the pipeline reduces all results to one verdict.
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-pub enum RuleOutcome {
-    Pass,
-    Unknown,
-    SoftFail,
-    HardFail,
-}
-
 /// A rule's identity when no violation exists to carry concrete evidence.
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum RuleKind {
@@ -81,19 +72,6 @@ pub enum RuleEvaluation {
     HardFail(Rule),
 }
 
-impl RuleEvaluation {
-    /// The outcome category used by verdict reduction.
-    #[must_use]
-    pub const fn outcome(&self) -> RuleOutcome {
-        match self {
-            Self::Pass(_) => RuleOutcome::Pass,
-            Self::Unknown(_) => RuleOutcome::Unknown,
-            Self::SoftFail(_) => RuleOutcome::SoftFail,
-            Self::HardFail(_) => RuleOutcome::HardFail,
-        }
-    }
-}
-
 /// A policy rule that can participate in the verdict pipeline.
 pub trait PolicyRule: std::fmt::Debug {
     fn evaluate(&self, context: &EvaluationContext<'_>) -> RuleEvaluation;