ci: remove unused secrets from dryrun steps

.drone.yml

@@ -32,11 +32,7 @@ steps:
     settings:
       dockerfile: Dockerfile
       dry_run: true
-      password:
-        from_secret: docker_password
       repo: thegeeklab/${DRONE_REPO_NAME}
-      username:
-        from_secret: docker_username
     when:
       ref:
         - refs/pull/**
@@ -195,6 +191,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 63707fff1636eda54bb525e5008a3813c091051c1b827dc6870f3fb9166060bf
+hmac: 59397086601e0eb3eb316c63633b2fa0acfd480e370013e605031fda92537310
 
 ...