Remove HOST_DENY_LIST usage as Notification plugin will own it

[xluo-aws]

Signed-off-by: Xuesong Luo lxuesong@amazon.com

*Issue #, if available: #107

*Description of changes: Remove HOST_DENY_LIST usage in three files

*CheckList: Build is successful and searched all repos in org to make sure no reference to the removed reference

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[opensearch-trigger-bot]

The backport to 2.3 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.3 2.3
# Navigate to the new working tree
cd .worktrees/backport-2.3
# Create a new branch
git switch --create backport/backport-471-to-2.3
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 39be4e3d240442f7079c8280f07e842fbb75c45a
# Push it to GitHub
git push --set-upstream origin backport/backport-471-to-2.3
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.3

Then, create a pull request where the base branch is 2.3 and the compare/head branch is backport/backport-471-to-2.3.