Documentation/dev-internal: remove ACI in release.md

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

Documentation/dev-internal/release.md

@@ -79,8 +79,8 @@ The following commands are used for public release sign:
 
 ```
 cd release
-for i in etcd-*{.zip,.tar.gz,.aci}; do gpg2 --default-key $SUBKEYID --armor --output ${i}.asc --detach-sign ${i}; done
-for i in etcd-*{.zip,.tar.gz,.aci}; do gpg2 --verify ${i}.asc ${i}; done
+for i in etcd-*{.zip,.tar.gz}; do gpg2 --default-key $SUBKEYID --armor --output ${i}.asc --detach-sign ${i}; done
+for i in etcd-*{.zip,.tar.gz}; do gpg2 --verify ${i}.asc ${i}; done
 
 # sign zipped source code files
 wget https://github.com/coreos/etcd/archive/${VERSION}.zip
@@ -99,7 +99,7 @@ The public key for GPG signing can be found at [CoreOS Application Signing Key](
 
 - Set release title as the version name.
 - Follow the format of previous release pages.
-- Attach the generated binaries, aci image and signatures.
+- Attach the generated binaries and signatures.
 - Select whether it is a pre-release.
 - Publish the release!