Stop calling unregisterWorkqueue which was removed in gerrit

Change-Id: Ia21e43e6d35de2a05756b5c099a17c56b92654b7
diff --git a/src/main/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProvider.java b/src/main/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProvider.java
index e1de403..e1e1595 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProvider.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProvider.java
@@ -44,7 +44,6 @@
   @Override
   public void stop() {
     executor.shutdown();
-    executor.unregisterWorkQueue();
     executor = null;
   }
 
diff --git a/src/test/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProviderTest.java b/src/test/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProviderTest.java
index a01b187..8b0cc12 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProviderTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/evictcache/EvictCacheExecutorProviderTest.java
@@ -58,7 +58,6 @@
     assertThat(evictCacheExecutorProvider.get()).isEqualTo(executorMock);
     evictCacheExecutorProvider.stop();
     verify(executorMock).shutdown();
-    verify(executorMock).unregisterWorkQueue();
     assertThat(evictCacheExecutorProvider.get()).isNull();
   }
 }