diff --git a/seahub/api2/endpoints/wiki2.py b/seahub/api2/endpoints/wiki2.py
index bb67ba3a722..7cff66e7739 100644
--- a/seahub/api2/endpoints/wiki2.py
+++ b/seahub/api2/endpoints/wiki2.py
@@ -3,51 +3,44 @@
 import os
 import json
 import logging
-import requests
 import posixpath
-import time
 import datetime
 import uuid
 import re
-import urllib.request, urllib.error, urllib.parse
 from copy import deepcopy
 from constance import config
 
 from rest_framework import status
 from rest_framework.authentication import SessionAuthentication
-from rest_framework.permissions import IsAuthenticated, IsAuthenticatedOrReadOnly
+from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 from rest_framework.views import APIView
-from seaserv import seafile_api, edit_repo
+from seaserv import seafile_api
 from pysearpc import SearpcError
 from django.utils.translation import gettext as _
-from django.core.cache import cache
 
 from seahub.api2.authentication import TokenAuthentication
 from seahub.api2.throttling import UserRateThrottle
-from seahub.api2.utils import api_error, to_python_boolean, is_wiki_repo, get_search_wiki_ids
+from seahub.api2.utils import api_error, is_wiki_repo
 from seahub.api2.endpoints.utils import wiki_search
 from seahub.utils.db_api import SeafileDB
 from seahub.wiki2.models import Wiki2 as Wiki
 from seahub.wiki2.models import WikiPageTrash, Wiki2Publish
-from seahub.wiki2.utils import is_valid_wiki_name, can_edit_wiki, get_wiki_dirs_by_path, \
-    get_wiki_config, WIKI_PAGES_DIR, WIKI_CONFIG_PATH, WIKI_CONFIG_FILE_NAME, is_group_wiki, \
+from seahub.wiki2.utils import is_valid_wiki_name, get_wiki_config, WIKI_PAGES_DIR, is_group_wiki, \
     check_wiki_admin_permission, check_wiki_permission, get_all_wiki_ids, get_and_gen_page_nav_by_id, \
     get_current_level_page_ids, save_wiki_config, gen_unique_id, gen_new_page_nav_by_id, pop_nav, \
-    delete_page, move_nav, revert_nav, get_sub_ids_by_page_id, get_parent_id_stack, SEARCH_WIKIS_LIMIT, \
-    RELATED_WIKIS_PREFIX, RELATED_WIKIS_CACHE_TIMEOUT
+    delete_page, move_nav, revert_nav, get_sub_ids_by_page_id, get_parent_id_stack
+
+from seahub.utils import is_org_context, get_user_repos, is_pro_version, is_valid_dirent_name, \
+    get_no_duplicate_obj_name
 
-from seahub.utils import is_org_context, get_user_repos, gen_inner_file_get_url, gen_file_upload_url, \
-    normalize_dir_path, is_pro_version, check_filename_with_rename, is_valid_dirent_name, get_no_duplicate_obj_name, \
-    normalize_cache_key
 from seahub.views import check_folder_permission
 from seahub.base.templatetags.seahub_tags import email2nickname
-from seahub.utils.file_op import check_file_lock, ONLINE_OFFICE_LOCK_OWNER, if_locked_by_online_office
-from seahub.utils.repo import parse_repo_perm, get_repo_owner, is_valid_repo_id_format
+from seahub.utils.file_op import check_file_lock
+from seahub.utils.repo import get_repo_owner, is_valid_repo_id_format
 from seahub.seadoc.utils import get_seadoc_file_uuid, gen_seadoc_access_token, copy_sdoc_images_with_sdoc_uuid
-from seahub.settings import SEADOC_SERVER_URL, ENABLE_STORAGE_CLASSES, STORAGE_CLASS_MAPPING_POLICY, \
+from seahub.settings import ENABLE_STORAGE_CLASSES, STORAGE_CLASS_MAPPING_POLICY, \
     ENCRYPTED_LIBRARY_VERSION
-from seahub.seadoc.sdoc_server_api import SdocServerAPI
 from seahub.utils.timeutils import timestamp_to_isoformat_timestr
 from seahub.utils.ccnet_db import CcnetDB
 from seahub.tags.models import FileUUIDMap
@@ -58,7 +51,6 @@
 from seahub.utils.rpc import SeafileAPI
 from seahub.constants import PERMISSION_READ_WRITE
 from seaserv import ccnet_api
-from seahub.signals import clean_up_repo_trash
 
 HTTP_520_OPERATION_FAILED = 520
 
diff --git a/seahub/api2/utils.py b/seahub/api2/utils.py
index cb96ff47f16..f57bb1e9b8f 100644
--- a/seahub/api2/utils.py
+++ b/seahub/api2/utils.py
@@ -313,24 +313,6 @@ def get_search_repos(username, org_id):
 
     return repos
 
-def get_search_wiki_ids(username, org_id):
-    owned_repos, shared_repos, group_repos, public_repos = get_user_repos(username, org_id=org_id)
-    repo_list = owned_repos + shared_repos + group_repos
-
-    wiki_id_set = set()
-    for repo in repo_list:
-        if not is_wiki_repo(repo):
-            continue
-        repo_id = repo.id
-        if repo.origin_repo_id:
-            repo_id = repo.origin_repo_id
-
-        if repo_id in wiki_id_set:
-            continue
-        wiki_id_set.add(repo_id)
-
-    return list(wiki_id_set)
-
 def send_share_link_emails(emails, fs, shared_from):
     subject = _("A share link for you")
     for email in emails:
diff --git a/seahub/wiki2/utils.py b/seahub/wiki2/utils.py
index e5b577a9b21..ac3dc3ab4b1 100644
--- a/seahub/wiki2/utils.py
+++ b/seahub/wiki2/utils.py
@@ -22,10 +22,6 @@
 WIKI_CONFIG_PATH = '_Internal/Wiki'
 WIKI_CONFIG_FILE_NAME = 'index.json'
 
-SEARCH_WIKIS_LIMIT = 200
-RELATED_WIKIS_PREFIX = 'RELATED_WIKIS_'
-RELATED_WIKIS_CACHE_TIMEOUT = 2 * 60 * 60
-
 
 def is_valid_wiki_name(name):
     name = name.strip()