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/tools/runtimes/shell.rs

@@ -11,10 +11,8 @@ use crate::tools::runtimes::build_command_spec;
 use crate::tools::sandboxing::Approvable;
 use crate::tools::sandboxing::ApprovalCtx;
 use crate::tools::sandboxing::ExecApprovalRequirement;
-use crate::tools::sandboxing::ProvidesSandboxRetryData;
 use crate::tools::sandboxing::SandboxAttempt;
 use crate::tools::sandboxing::SandboxOverride;
-use crate::tools::sandboxing::SandboxRetryData;
 use crate::tools::sandboxing::Sandboxable;
 use crate::tools::sandboxing::SandboxablePreference;
 use crate::tools::sandboxing::ToolCtx;
@@ -36,15 +34,6 @@ pub struct ShellRequest {
     pub exec_approval_requirement: ExecApprovalRequirement,
 }
 
-impl ProvidesSandboxRetryData for ShellRequest {
-    fn sandbox_retry_data(&self) -> Option<SandboxRetryData> {
-        Some(SandboxRetryData {
-            command: self.command.clone(),
-            cwd: self.cwd.clone(),
-        })
-    }
-}
-
 #[derive(Default)]
 pub struct ShellRuntime;
 
@@ -101,7 +90,6 @@ impl Approvable<ShellRequest> for ShellRuntime {
             .retry_reason
             .clone()
             .or_else(|| req.justification.clone());
-        let risk = ctx.risk.clone();
         let session = ctx.session;
         let turn = ctx.turn;
         let call_id = ctx.call_id.to_string();
@@ -114,7 +102,6 @@ impl Approvable<ShellRequest> for ShellRuntime {
                         command,
                         cwd,
                         reason,
-                        risk,
                         req.exec_approval_requirement
                             .proposed_execpolicy_amendment()
                             .cloned(),