diff --git a/typings/internalBinding/blob.d.ts b/typings/internalBinding/blob.d.ts
index 5396c863bb5e59..9a22c789e189bc 100644
--- a/typings/internalBinding/blob.d.ts
+++ b/typings/internalBinding/blob.d.ts
@@ -2,18 +2,10 @@ declare namespace InternalBlobBinding {
   interface BlobHandle {
     slice(start: number, end: number): BlobHandle;
   }
-
-  class FixedSizeBlobCopyJob {
-    constructor(handle: BlobHandle);
-    run(): ArrayBuffer | undefined;
-    ondone: (err: unknown, res?: ArrayBuffer) => void;
-  }
 }
 
 export interface BlobBinding {
   createBlob(sources: Array<Uint8Array | InternalBlobBinding.BlobHandle>, length: number): InternalBlobBinding.BlobHandle;
-  FixedSizeBlobCopyJob: typeof InternalBlobBinding.FixedSizeBlobCopyJob;
   getDataObject(id: string): [handle: InternalBlobBinding.BlobHandle | undefined, length: number, type: string] | undefined;
   storeDataObject(id: string, handle: InternalBlobBinding.BlobHandle, size: number, type: string): void;
-  revokeDataObject(id: string): void;
 }