GEODE-10639: Remove the geode-native build image steps from promote_rc.sh

[JinwooHwang]

geode-native removed its root docker/Dockerfile and .travis.yml in 2021, so the build environment image these steps produced has had no source since then and was last published in 2022.

For all changes, please confirm:

• Is there a JIRA ticket associated with this PR? Is it referenced in the commit message?
• Has your PR been rebased against the latest commit within the target branch (typically develop)?
• Is your initial contribution a single, squashed commit?
• Does gradlew build run cleanly?
• Have you written or updated unit tests to verify your changes?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?