refactor: remove `dependabot-preview` config file

.dependabot/config.yml

@@ -1,23 +0,0 @@
-version: 1
-update_configs:
-  # Keep package.json (& lockfiles) up to date as soon as
-  # new versions are published to the npm registry
-  - package_manager: "javascript"
-    directory: "/"
-    update_schedule: "live"
-    # Apply default reviewer(s), assignee(s) and label to created
-    # pull requests
-    default_reviewers:
-      - "Rich-Harris"
-      - "Conduitry"
-    default_assignees:
-      - "Rich-Harris"
-      - "Conduitry"
-      - "antony"
-    default_labels:
-      - "dependencies"
-    # Enable correct commit message using scope, eg. chore(deps): <pkg> update
-    commit_message:
-      prefix: "fix"
-      prefix_development: "chore"
-      include_scope: true