Implement whitelist outgoing edge backsliding

    RELNOTES:none
    PiperOrigin-RevId: 241519185

dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/analysis/Whitelist.java

@@ -98,19 +98,6 @@ public static PackageSpecificationProvider fetchPackageSpecificationProvider(
     return requireNonNull(packageSpecificationProvider, packageGroup.getLabel().toString());
   }
 
-  /**
-   * Returns whether the given label is in the whitelist provided.
-   *
-   * @param whitelist the whitelist provided
-   * @param relevantLabel the label to check for in the whitelist.
-   */
-  public static boolean isAvailableForWhitelist(
-      TransitiveInfoCollection whitelist, Label relevantLabel) {
-    PackageSpecificationProvider packageSpecificationProvider =
-        whitelist.getProvider(PackageSpecificationProvider.class);
-    return isAvailableFor(packageSpecificationProvider.getPackageSpecifications(), relevantLabel);
-  }
-
   public static boolean isAvailableFor(
       Iterable<PackageGroupContents> packageGroupContents, Label relevantLabel) {
     return Streams.stream(packageGroupContents)