refactor(git): move commit exists function to project

pkg/git/commit.go

@@ -1,10 +1,8 @@
 package git
 
 import (
-	"errors"
 	"fmt"
 	"path/filepath"
-	"strings"
 	"time"
 
 	"github.com/ProtonMail/go-crypto/openpgp"
@@ -95,22 +93,6 @@ func (c *Commit) Create(msg string) error {
 	return nil
 }
 
-func (c *Commit) Exists(uid string, id uint) bool {
-	commitIter, err := c.project.repository.Log(&git.LogOptions{})
-	if err != nil {
-		return false
-	}
-
-	err = commitIter.ForEach(func(commit *object.Commit) error {
-		if strings.Contains(commit.Message, fmt.Sprintf("Update %s", uid)) &&
-			strings.Contains(commit.Message, fmt.Sprintf("version %d", id)) {
-			return errors.New("version already committed")
-		}
-		return nil
-	})
-	return err != nil
-}
-
 func (c *Commit) addContent() error {
 	file, err := c.project.worktree.Filesystem.Create(c.Filename)
 	if err != nil {