We don't actually use repo.

spec/git-repository-async-spec.js

@@ -31,7 +31,7 @@ describe('GitRepositoryAsync', () => {
   })
 
   describe('@open(path)', () => {
-    it('repo is null when no repository is found', async () => {
+    it('should throw when no repository is found', async () => {
       repo = GitRepositoryAsync.open(path.join(temp.dir, 'nogit.txt'))
 
       let threw = false
@@ -42,7 +42,6 @@ describe('GitRepositoryAsync', () => {
       }
 
       expect(threw).toBe(true)
-      expect(repo.repo).toBe(null)
     })
   })
 

src/git-repository-async.js

@@ -30,7 +30,6 @@ export default class GitRepositoryAsync {
   }
 
   constructor (_path, options = {}) {
-    this.repo = null
     this.emitter = new Emitter()
     this.subscriptions = new CompositeDisposable()
     this.pathStatusCache = {}