.gitignore: remove oauth/ (zalando#2498)

Followup on zalando#2210

Signed-off-by: Alexander Yastrebov <[email protected]>

Author: AlexanderYastrebov

.gitignore

@@ -4,8 +4,6 @@ bin
 pkg
 src/github.com/mailgun
 default.etcd
-oauth/client.json
-oauth/user.json
 .idea
 *.iml
 *.xcf