disable PDF reader for now

Looks like it causes an issue with the esm package

.changeset/few-pants-swim.md

+---
+"llamaindex": patch
+---
+
+Disabling PDF loader for now to fix module import

packages/core/src/readers/PDFReader.ts

@@ -2,7 +2,6 @@ import { Document } from "../Node";
 import { BaseReader } from "./base";
 import { GenericFileSystem } from "../storage/FileSystem";
 import { DEFAULT_FS } from "../storage/constants";
-import { default as pdfParse } from "pdf-parse";
 import _ from "lodash";
 
 /**
@@ -13,8 +12,6 @@ export class PDFReader implements BaseReader {
     file: string,
     fs: GenericFileSystem = DEFAULT_FS
   ): Promise<Document[]> {
-    let dataBuffer = (await fs.readFile(file)) as any;
-    const data = await pdfParse(dataBuffer);
-    return [new Document({ text: data.text, id_: file })];
+    throw new Error("not implemented");
   }
 }