Remove getStarredChanges

Upstream removed getStarredChanges, so we need to remove it here as
well. (https://gerrit-review.googlesource.com/#/c/78166)

Change-Id: Ia9840bf35877d902826305a30c3eeea7a2113e45
diff --git a/src/main/java/com/googlesource/gerrit/plugins/serviceuser/ServiceUserResolver.java b/src/main/java/com/googlesource/gerrit/plugins/serviceuser/ServiceUserResolver.java
index 9a0a851..5d88910 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/serviceuser/ServiceUserResolver.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/serviceuser/ServiceUserResolver.java
@@ -104,11 +104,6 @@
           return new CurrentUser(null) {
 
             @Override
-            public Set<Id> getStarredChanges() {
-              return null;
-            }
-
-            @Override
             public GroupMembership getEffectiveGroups() {
               return new GroupMembership() {
                 @Override