Revert "Option to Notify Workspace Owner When Usage Limit is Reached" (#17391)

Reverts openai/codex#16969

#sev3-2026-04-10-accountscheckversion-500s-for-openai-workspace-7300

codex-rs/codex-api/src/rate_limits.rs

@@ -92,7 +92,6 @@ pub fn parse_rate_limit_for_limit(
         primary,
         secondary,
         credits,
-        spend_control: None,
         plan_type: None,
     })
 }
@@ -156,7 +155,6 @@ pub fn parse_rate_limit_event(payload: &str) -> Option<RateLimitSnapshot> {
         primary,
         secondary,
         credits,
-        spend_control: None,
         plan_type: event.plan_type,
     })
 }