diff --git a/packages/core/src/config/config.ts b/packages/core/src/config/config.ts
index aa912533bc..fdd6284d78 100644
--- a/packages/core/src/config/config.ts
+++ b/packages/core/src/config/config.ts
@@ -2585,10 +2585,6 @@ export class Config implements McpContext, AgentLoopContext {
     return this.experimentalContextManagementConfig;
   }
 
-  isAgentSessionEnabled(): boolean {
-    return this.agentSessionSubagentEnabled;
-  }
-
   getContextManagementConfig(): ContextManagementConfig {
     return this.contextManagement;
   }
@@ -3784,10 +3780,6 @@ export class Config implements McpContext, AgentLoopContext {
     );
   }
 
-  getAgentSessionSubagentEnabled(): boolean {
-    return this.agentSessionSubagentEnabled;
-  }
-
   /**
    * Get override settings for a specific agent.
    * Reads from agents.overrides.<agentName>.