diff --git a/src/core/RPCPlugin.ts b/src/core/RPCPlugin.ts
index f621a05..391bba1 100644
--- a/src/core/RPCPlugin.ts
+++ b/src/core/RPCPlugin.ts
@@ -61,8 +61,6 @@ export abstract class AbstractRPCPlugin implements RPCPlugin {
 
 type HookName = keyof RPCPluginHooksCtx;
 
-export class HookChainInterruptedError extends Error { };
-
 type HookRunner<Ctx> = (ctx: Ctx) => Promise<void>;
 export function createHookRunner<K extends HookName>(
     plugins: RPCPlugin[],