Removed experimental "command risk assessment" feature (#7799)

This experimental feature received lukewarm reception during internal
testing. Removing from the code base.

codex-rs/core/src/codex.rs

@@ -95,7 +95,6 @@ use crate::protocol::RateLimitSnapshot;
 use crate::protocol::ReasoningContentDeltaEvent;
 use crate::protocol::ReasoningRawContentDeltaEvent;
 use crate::protocol::ReviewDecision;
-use crate::protocol::SandboxCommandAssessment;
 use crate::protocol::SandboxPolicy;
 use crate::protocol::SessionConfiguredEvent;
 use crate::protocol::StreamErrorEvent;
@@ -875,34 +874,6 @@ impl Session {
         .await;
     }
 
-    pub(crate) async fn assess_sandbox_command(
-        &self,
-        turn_context: &TurnContext,
-        call_id: &str,
-        command: &[String],
-        failure_message: Option<&str>,
-    ) -> Option<SandboxCommandAssessment> {
-        let config = turn_context.client.config();
-        let provider = turn_context.client.provider().clone();
-        let auth_manager = Arc::clone(&self.services.auth_manager);
-        let otel = self.services.otel_event_manager.clone();
-        crate::sandboxing::assessment::assess_command(
-            config,
-            provider,
-            auth_manager,
-            &otel,
-            self.conversation_id,
-            self.services.models_manager.clone(),
-            turn_context.client.get_session_source(),
-            call_id,
-            command,
-            &turn_context.sandbox_policy,
-            &turn_context.cwd,
-            failure_message,
-        )
-        .await
-    }
-
     /// Adds an execpolicy amendment to both the in-memory and on-disk policies so future
     /// commands can use the newly approved prefix.
     pub(crate) async fn persist_execpolicy_amendment(
@@ -950,7 +921,6 @@ impl Session {
         command: Vec<String>,
         cwd: PathBuf,
         reason: Option<String>,
-        risk: Option<SandboxCommandAssessment>,
         proposed_execpolicy_amendment: Option<ExecPolicyAmendment>,
     ) -> ReviewDecision {
         let sub_id = turn_context.sub_id.clone();
@@ -978,7 +948,6 @@ impl Session {
             command,
             cwd,
             reason,
-            risk,
             proposed_execpolicy_amendment,
             parsed_cmd,
         });