fix(api-compat): remove openAIAgents from public BraintrustPluginConfig and InstrumentationConfig interfaces

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Stephen Belanger

js/src/instrumentation/braintrust-plugin.ts

@@ -27,7 +27,6 @@ export interface BraintrustPluginConfig {
     claudeAgentSDK?: boolean;
     cursor?: boolean;
     cursorSDK?: boolean;
-    openAIAgents?: boolean;
     openrouter?: boolean;
     openrouterAgent?: boolean;
     mistral?: boolean;

js/src/instrumentation/registry.ts

@@ -23,7 +23,6 @@ export interface InstrumentationConfig {
     claudeAgentSDK?: boolean;
     cursor?: boolean;
     cursorSDK?: boolean;
-    openAIAgents?: boolean;
     openrouter?: boolean;
     openrouterAgent?: boolean;
     mistral?: boolean;