Remove GPG_TTY system variable from tag-release documentation (#627)

_articles/appdev-deploy.md

@@ -252,7 +252,6 @@ Where `<PR_NUMBER>` is the number of the _merged_ PR.
 1. In the application repository, use your GPG key to tag the release.
    ```bash
    git checkout stages/prod && git pull
-   export GPG_TTY=$(tty)
    bin/tag-release
    ```
 2. Add release notes in GitHub:
@@ -350,4 +349,4 @@ For environments other than prod, note that if a migration has been introduced o
 
 Additionally, migration instances are responsible for compiling assets.  If assets have changed since the last migration, we recommend against running a no-migration recycle.  Otherwise, the new servers will look for fingerprinted asset files that don't exist, because the migration instances never created them.
 
-To tell if assets have changed since the last migration, inspect the [Environments status page](https://dashboard.int.identitysandbox.gov/env).  Click "pending changes" and determine if any files changed in `app/assets/stylesheets` or `app/javascript`.
+To tell if assets have changed since the last migration, inspect the [Environments status page](https://dashboard.int.identitysandbox.gov/env).  Click "pending changes" and determine if any files changed in `app/assets/stylesheets` or `app/javascript`.