Remove unnecessary assignment of Commit#repo
Remove unnecessary assignment of Commit#repo

Repository#getCommit uses Commit.lookup and then manually assigns
to Commit#repo even though Commit.lookup already does that.

jmurzy/nodegit,nodegit/nodegit,jmurzy/nodegit,nodegit/nodegit,jmurzy/nodegit,jmurzy/nodegit,nodegit/nodegit,nodegit/nodegit,jmurzy/nodegit,nodegit/nodegit