Remove promoted-builds exclusion from dependabot def

Author: MarkEWaite

.github/dependabot.yml

@@ -5,10 +5,6 @@ updates:
   # Maintain dependencies for maven
   - package-ecosystem: "maven"
     directory: "/"
-    ignore:
-      # Fails plugin bill of materials tests
-      # https://github.com/jenkinsci/bom/issues/3171
-      - dependency-name: "org.jenkins-ci.plugins:promoted-builds"
     schedule:
       interval: "weekly"
     labels: