remove incorrect import

types/defines/rpc.d.ts

@@ -1,8 +1,5 @@
 // Namespace for RPC utility types. Unfortunately, we can't use a `module` here as these types need
 // to referenced by `Fetcher`. This is included in the "importable" version of the types which
-
-import { Serializable } from "child_process";
-
 // strips all `module` blocks.
 declare namespace Rpc {
   // Branded types for identifying `WorkerEntrypoint`/`DurableObject`/`Target`s.
@@ -158,7 +155,8 @@ declare module "cloudflare:workers" {
   // `protected` fields don't appear in `keyof`s, so can't be accessed over RPC
 
   export abstract class WorkerEntrypoint<Env = unknown>
-    implements Rpc.WorkerEntrypointBranded {
+    implements Rpc.WorkerEntrypointBranded
+  {
     [Rpc.__WORKER_ENTRYPOINT_BRAND]: never;
 
     protected ctx: ExecutionContext;
@@ -174,7 +172,8 @@ declare module "cloudflare:workers" {
   }
 
   export abstract class DurableObject<Env = unknown>
-    implements Rpc.DurableObjectBranded {
+    implements Rpc.DurableObjectBranded
+  {
     [Rpc.__DURABLE_OBJECT_BRAND]: never;
 
     protected ctx: DurableObjectState;
@@ -196,27 +195,38 @@ declare module "cloudflare:workers" {
     webSocketError?(ws: WebSocket, error: unknown): void | Promise<void>;
   }
 
-  export type DurationLabel = 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month' | 'year';
-  export type SleepDuration = `${number} ${DurationLabel}${'s' | ''}` | number;
-
+  export type DurationLabel =
+    | "second"
+    | "minute"
+    | "hour"
+    | "day"
+    | "week"
+    | "month"
+    | "year";
+  export type SleepDuration = `${number} ${DurationLabel}${"s" | ""}` | number;
 
   type WorkflowStep = {
-    do: <T extends Serializable>(name: string, callback: () => T) => T | Promise<T>;
-    sleep:(name: string, duration: SleepDuration) => void | Promise<void>;
-  }
-
+    do: <T extends Serializable>(
+      name: string,
+      callback: () => T
+    ) => T | Promise<T>;
+    sleep: (name: string, duration: SleepDuration) => void | Promise<void>;
+  };
 
-  export abstract class Workflow<Env = unknown, T extends Serializable | unknown = unknown>
-    implements Rpc.WorkflowBranded {
+  export abstract class Workflow<
+    Env = unknown,
+    T extends Serializable | unknown = unknown,
+  > implements Rpc.WorkflowBranded
+  {
     [Rpc.__WORKFLOW_BRAND]: never;
 
     protected ctx: ExecutionContext;
     protected env: Env;
 
     run(
       events: Array<{
-        payload: T,
-        timestamp: Date
+        payload: T;
+        timestamp: Date;
       }>,
       step: WorkflowStep
     ): unknown | Promise<unknown>;