Delete unused method

PiperOrigin-RevId: 301920582
diff --git a/src/main/java/com/google/devtools/build/lib/query2/query/output/ProtoOutputFormatter.java b/src/main/java/com/google/devtools/build/lib/query2/query/output/ProtoOutputFormatter.java
index 5b4387a..db2573e 100644
--- a/src/main/java/com/google/devtools/build/lib/query2/query/output/ProtoOutputFormatter.java
+++ b/src/main/java/com/google/devtools/build/lib/query2/query/output/ProtoOutputFormatter.java
@@ -374,7 +374,7 @@
             .sorted(ATTRIBUTE_NAME)
             .collect(Collectors.toList()));
 
-    if (includeSyntheticAttributeHash()) {
+    if (includeSyntheticAttributeHash) {
       rulePb.addAttribute(
           Build.Attribute.newBuilder()
               .setName("$internal_attr_hash")
@@ -439,11 +439,6 @@
     return true;
   }
 
-  /** Returns if the "$internal_attr_hash" should be computed and added to the result. */
-  protected boolean includeSyntheticAttributeHash() {
-    return includeSyntheticAttributeHash;
-  }
-
   /**
    * Coerces the list {@param possibleValues} of values of type {@param attrType} to a single
    * value of that type, in the following way: