diff --git a/modules/indexer/issue.go b/modules/indexer/issue.go
deleted file mode 100644
index 29c78307b633..000000000000
--- a/modules/indexer/issue.go
+++ /dev/null
@@ -1,143 +0,0 @@
-// Copyright 2017 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package indexer
-
-import (
-	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/setting"
-
-	"github.com/blevesearch/bleve"
-	"github.com/blevesearch/bleve/analysis/analyzer/custom"
-	"github.com/blevesearch/bleve/analysis/token/lowercase"
-	"github.com/blevesearch/bleve/analysis/tokenizer/unicode"
-	"github.com/ethantkoenig/rupture"
-)
-
-// issueIndexer (thread-safe) index for searching issues
-var issueIndexer bleve.Index
-
-const (
-	issueIndexerAnalyzer = "issueIndexer"
-	issueIndexerDocType  = "issueIndexerDocType"
-
-	issueIndexerLatestVersion = 1
-)
-
-// IssueIndexerData data stored in the issue indexer
-type IssueIndexerData struct {
-	RepoID   int64
-	Title    string
-	Content  string
-	Comments []string
-}
-
-// Type returns the document type, for bleve's mapping.Classifier interface.
-func (i *IssueIndexerData) Type() string {
-	return issueIndexerDocType
-}
-
-// IssueIndexerUpdate an update to the issue indexer
-type IssueIndexerUpdate struct {
-	IssueID int64
-	Data    *IssueIndexerData
-}
-
-// AddToFlushingBatch adds the update to the given flushing batch.
-func (i IssueIndexerUpdate) AddToFlushingBatch(batch rupture.FlushingBatch) error {
-	return batch.Index(indexerID(i.IssueID), i.Data)
-}
-
-// InitIssueIndexer initialize issue indexer
-func InitIssueIndexer(populateIndexer func() error) {
-	var err error
-	issueIndexer, err = openIndexer(setting.Indexer.IssuePath, issueIndexerLatestVersion)
-	if err != nil {
-		log.Fatal(4, "InitIssueIndexer: %v", err)
-	}
-	if issueIndexer != nil {
-		return
-	}
-
-	if err = createIssueIndexer(setting.Indexer.IssuePath, issueIndexerLatestVersion); err != nil {
-		log.Fatal(4, "InitIssuesIndexer: create index, %v", err)
-	}
-	if err = populateIndexer(); err != nil {
-		log.Fatal(4, "InitIssueIndexer: populate index, %v", err)
-	}
-}
-
-// createIssueIndexer create an issue indexer if one does not already exist
-func createIssueIndexer(path string, latestVersion int) error {
-	mapping := bleve.NewIndexMapping()
-	docMapping := bleve.NewDocumentMapping()
-
-	numericFieldMapping := bleve.NewNumericFieldMapping()
-	numericFieldMapping.IncludeInAll = false
-	docMapping.AddFieldMappingsAt("RepoID", numericFieldMapping)
-
-	textFieldMapping := bleve.NewTextFieldMapping()
-	textFieldMapping.Store = false
-	textFieldMapping.IncludeInAll = false
-	docMapping.AddFieldMappingsAt("Title", textFieldMapping)
-	docMapping.AddFieldMappingsAt("Content", textFieldMapping)
-	docMapping.AddFieldMappingsAt("Comments", textFieldMapping)
-
-	if err := addUnicodeNormalizeTokenFilter(mapping); err != nil {
-		return err
-	} else if err = mapping.AddCustomAnalyzer(issueIndexerAnalyzer, map[string]interface{}{
-		"type":          custom.Name,
-		"char_filters":  []string{},
-		"tokenizer":     unicode.Name,
-		"token_filters": []string{unicodeNormalizeName, lowercase.Name},
-	}); err != nil {
-		return err
-	}
-
-	mapping.DefaultAnalyzer = issueIndexerAnalyzer
-	mapping.AddDocumentMapping(issueIndexerDocType, docMapping)
-	mapping.AddDocumentMapping("_all", bleve.NewDocumentDisabledMapping())
-
-	var err error
-	issueIndexer, err = bleve.New(path, mapping)
-	if err != nil {
-		return err
-	}
-
-	return rupture.WriteIndexMetadata(path, &rupture.IndexMetadata{
-		Version: latestVersion,
-	})
-}
-
-// IssueIndexerBatch batch to add updates to
-func IssueIndexerBatch() rupture.FlushingBatch {
-	return rupture.NewFlushingBatch(issueIndexer, maxBatchSize)
-}
-
-// SearchIssuesByKeyword searches for issues by given conditions.
-// Returns the matching issue IDs
-func SearchIssuesByKeyword(repoID int64, keyword string) ([]int64, error) {
-	indexerQuery := bleve.NewConjunctionQuery(
-		numericEqualityQuery(repoID, "RepoID"),
-		bleve.NewDisjunctionQuery(
-			newMatchPhraseQuery(keyword, "Title", issueIndexerAnalyzer),
-			newMatchPhraseQuery(keyword, "Content", issueIndexerAnalyzer),
-			newMatchPhraseQuery(keyword, "Comments", issueIndexerAnalyzer),
-		))
-	search := bleve.NewSearchRequestOptions(indexerQuery, 2147483647, 0, false)
-
-	result, err := issueIndexer.Search(search)
-	if err != nil {
-		return nil, err
-	}
-
-	issueIDs := make([]int64, len(result.Hits))
-	for i, hit := range result.Hits {
-		issueIDs[i], err = idOfIndexerID(hit.ID)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return issueIDs, nil
-}