Fix wrong import for pdf loader

Author: RHeckerIntel

lib/langchain/loaders/pdf_loader.dart

@@ -2,7 +2,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
-import 'package:inference/scratch.dart';
+import 'package:inference/utils/pdf_parser.dart';
 import 'package:langchain/langchain.dart';
 import 'package:uuid/uuid.dart';
 

lib/pages/knowledge_base/widgets/documents_list.dart

@@ -5,7 +5,6 @@
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:dart_pdf_reader/dart_pdf_reader.dart';
 import 'package:file_picker/file_picker.dart';
 import 'package:fluent_ui/fluent_ui.dart';
 import 'package:inference/interop/sentence_transformer.dart';