diff --git a/routers/api/v1/admin/migrate_submit.go b/routers/api/v1/admin/migrate_submit.go
deleted file mode 100644
index 7680de0a0..000000000
--- a/routers/api/v1/admin/migrate_submit.go
+++ /dev/null
@@ -1,155 +0,0 @@
-package admin
-
-import (
-	"code.gitea.io/gitea/models"
-	"code.gitea.io/gitea/modules/auth"
-	"code.gitea.io/gitea/modules/context"
-	"code.gitea.io/gitea/modules/migrations"
-	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/structs"
-	"code.gitea.io/gitea/modules/task"
-	"code.gitea.io/gitea/modules/util"
-	"code.gitea.io/gitea/routers/response"
-	"fmt"
-	"net/http"
-	"net/url"
-	"strings"
-)
-
-func MigrateSubmit(ctx *context.APIContext, form auth.MigrateRepoForm) {
-	ctxUser, bizErr := checkContextUser(ctx, form.UID)
-	if bizErr != nil {
-		ctx.JSON(http.StatusOK, response.ResponseError(bizErr))
-		return
-	}
-
-	remoteAddr, err := form.ParseRemoteAddr(ctx.User)
-	if err != nil {
-		if models.IsErrInvalidCloneAddr(err) {
-			addrErr := err.(models.ErrInvalidCloneAddr)
-			switch {
-			case addrErr.IsURLError:
-				ctx.JSON(http.StatusOK, response.PARAM_ERROR)
-			case addrErr.IsPermissionDenied:
-				ctx.JSON(http.StatusOK, response.INSUFFICIENT_PERMISSION)
-			case addrErr.IsInvalidPath:
-				ctx.JSON(http.StatusOK, response.PARAM_ERROR)
-			default:
-				ctx.JSON(http.StatusOK, response.SYSTEM_ERROR)
-			}
-		} else {
-			ctx.JSON(http.StatusOK, response.SYSTEM_ERROR)
-		}
-		return
-	}
-
-	var gitServiceType = structs.PlainGitService
-	u, err := url.Parse(form.CloneAddr)
-	if err == nil && strings.EqualFold(u.Host, "github.com") {
-		gitServiceType = structs.GithubService
-	}
-
-	var opts = migrations.MigrateOptions{
-		OriginalURL:    form.CloneAddr,
-		GitServiceType: gitServiceType,
-		CloneAddr:      remoteAddr,
-		RepoName:       form.RepoName,
-		Alias:          form.Alias,
-		Description:    form.Description,
-		Private:        form.Private || setting.Repository.ForcePrivate,
-		Mirror:         form.Mirror,
-		AuthUsername:   form.AuthUsername,
-		AuthPassword:   form.AuthPassword,
-		Wiki:           form.Wiki,
-		Issues:         form.Issues,
-		Milestones:     form.Milestones,
-		Labels:         form.Labels,
-		Comments:       true,
-		PullRequests:   form.PullRequests,
-		Releases:       form.Releases,
-	}
-	if opts.Mirror {
-		opts.Issues = false
-		opts.Milestones = false
-		opts.Labels = false
-		opts.Comments = false
-		opts.PullRequests = false
-		opts.Releases = false
-	}
-
-	err = models.CheckCreateRepository(ctx.User, ctxUser, opts.RepoName, opts.Alias)
-	if err != nil {
-		handleMigrateError(ctx, ctxUser, remoteAddr, err)
-		return
-	}
-
-	err = task.MigrateRepository(ctx.User, ctxUser, opts)
-	if err == nil {
-		r := make(map[string]string)
-		r["OpenIUrl"] = strings.TrimSuffix(setting.AppURL, "/") + "/" + ctxUser.Name + "/" + opts.RepoName
-		r["OriginUrl"] = form.CloneAddr
-		ctx.JSON(http.StatusOK, response.SuccessWithData(r))
-		return
-	}
-
-	handleMigrateError(ctx, ctxUser, remoteAddr, err)
-}
-
-func checkContextUser(ctx *context.APIContext, uid int64) (*models.User, *response.BizError) {
-	if uid == ctx.User.ID || uid == 0 {
-		return ctx.User, nil
-	}
-
-	org, err := models.GetUserByID(uid)
-	if models.IsErrUserNotExist(err) {
-		return ctx.User, nil
-	}
-
-	if err != nil {
-		return nil, response.SYSTEM_ERROR
-	}
-
-	// Check ownership of organization.
-	if !org.IsOrganization() {
-		return nil, nil
-	}
-	if !ctx.User.IsAdmin {
-		canCreate, err := org.CanCreateOrgRepo(ctx.User.ID)
-		if err != nil {
-			return nil, response.NewBizError(err)
-		} else if !canCreate {
-			return nil, response.INSUFFICIENT_PERMISSION
-		}
-	}
-	return org, nil
-}
-
-func handleMigrateError(ctx *context.APIContext, repoOwner *models.User, remoteAddr string, err error) {
-	switch {
-	case models.IsErrRepoAlreadyExist(err):
-		ctx.JSON(http.StatusOK, response.ServerError("The repository with the same name already exists."))
-	case migrations.IsRateLimitError(err):
-		ctx.JSON(http.StatusOK, response.ServerError("Remote visit addressed rate limitation."))
-	case migrations.IsTwoFactorAuthError(err):
-		ctx.JSON(http.StatusOK, response.ServerError("Remote visit required two factors authentication."))
-	case models.IsErrReachLimitOfRepo(err):
-		ctx.JSON(http.StatusOK, response.ServerError(fmt.Sprintf("You have already reached your limit of %d repositories.", repoOwner.MaxCreationLimit())))
-	case models.IsErrNameReserved(err):
-		ctx.JSON(http.StatusOK, response.ServerError(fmt.Sprintf("The username '%s' is reserved.", err.(models.ErrNameReserved).Name)))
-	case models.IsErrNameCharsNotAllowed(err):
-		ctx.JSON(http.StatusOK, response.ServerError(fmt.Sprintf("The username '%s' contains invalid characters.", err.(models.ErrNameCharsNotAllowed).Name)))
-	case models.IsErrNamePatternNotAllowed(err):
-		ctx.JSON(http.StatusOK, response.ServerError(fmt.Sprintf("The pattern '%s' is not allowed in a username.", err.(models.ErrNamePatternNotAllowed).Pattern)))
-	default:
-		err = util.URLSanitizedError(err, remoteAddr)
-		if strings.Contains(err.Error(), "Authentication failed") ||
-			strings.Contains(err.Error(), "Bad credentials") ||
-			strings.Contains(err.Error(), "could not read Username") {
-			ctx.JSON(http.StatusOK, response.ServerError(fmt.Sprintf("Authentication failed: %v.", err)))
-		} else if strings.Contains(err.Error(), "fatal:") {
-			ctx.JSON(http.StatusOK, response.ServerError(fmt.Sprintf("Migration failed: %v.", err)))
-		} else {
-			ctx.JSON(http.StatusOK, response.ServerError(err.Error()))
-		}
-	}
-}