Avoid double imports (#17569)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

.revive.toml

 [rule.unexported-return]
 [rule.indent-error-flow]
 [rule.errorf]
+[rule.duplicated-imports]

models/issue.go

 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/references"
-	"code.gitea.io/gitea/modules/structs"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
 }
 
 // UpdateIssuesMigrationsByType updates all migrated repositories' issues from gitServiceType to replace originalAuthorID to posterID
-func UpdateIssuesMigrationsByType(gitServiceType structs.GitServiceType, originalAuthorID string, posterID int64) error {
+func UpdateIssuesMigrationsByType(gitServiceType api.GitServiceType, originalAuthorID string, posterID int64) error {
 	_, err := db.GetEngine(db.DefaultContext).Table("issue").
 		Where("repo_id IN (SELECT id FROM repository WHERE original_service_type = ?)", gitServiceType).
 		And("original_author_id = ?", originalAuthorID).
 }
 
 // UpdateReactionsMigrationsByType updates all migrated repositories' reactions from gitServiceType to replace originalAuthorID to posterID
-func UpdateReactionsMigrationsByType(gitServiceType structs.GitServiceType, originalAuthorID string, userID int64) error {
+func UpdateReactionsMigrationsByType(gitServiceType api.GitServiceType, originalAuthorID string, userID int64) error {
 	_, err := db.GetEngine(db.DefaultContext).Table("reaction").
 		Where("original_author_id = ?", originalAuthorID).
 		And(migratedIssueCond(gitServiceType)).

modules/convert/convert.go

 	"code.gitea.io/gitea/models/login"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/structs"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/services/webhook"
 		commitVerification.Payload = c.Signature.Payload
 	}
 	if verif.SigningUser != nil {
-		commitVerification.Signer = &structs.PayloadUser{
+		commitVerification.Signer = &api.PayloadUser{
 			Name:  verif.SigningUser.Name,
 			Email: verif.SigningUser.Email,
 		}

modules/migrations/gitea_uploader.go

 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/migrations/base"
-	"code.gitea.io/gitea/modules/repository"
 	repo_module "code.gitea.io/gitea/modules/repository"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
 	}
 	r.DefaultBranch = repo.DefaultBranch
 
-	r, err = repository.MigrateRepositoryGitData(g.ctx, owner, r, base.MigrateOptions{
+	r, err = repo_module.MigrateRepositoryGitData(g.ctx, owner, r, base.MigrateOptions{
 		RepoName:       g.repoName,
 		Description:    repo.Description,
 		OriginalURL:    repo.OriginalURL,
 
 // SyncTags syncs releases with tags in the database
 func (g *GiteaLocalUploader) SyncTags() error {
-	return repository.SyncReleasesWithTags(g.repo, g.gitRepo)
+	return repo_module.SyncReleasesWithTags(g.repo, g.gitRepo)
 }
 
 // CreateIssues creates issues

routers/api/v1/repo/transfer.go

 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/convert"
 	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/structs"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/web"
 	repo_service "code.gitea.io/gitea/services/repository"
 	}
 
 	if newOwner.Type == models.UserTypeOrganization {
-		if !ctx.User.IsAdmin && newOwner.Visibility == structs.VisibleTypePrivate && !newOwner.HasMemberWithUserID(ctx.User.ID) {
+		if !ctx.User.IsAdmin && newOwner.Visibility == api.VisibleTypePrivate && !newOwner.HasMemberWithUserID(ctx.User.ID) {
 			// The user shouldn't know about this organization
 			ctx.Error(http.StatusNotFound, "", "The new owner does not exist or cannot be found")
 			return