Remove exceptions declared in throws but never thrown

Fix warning in AbstractSubscriberTestBase where exceptions
were declared to be thrown by test methods but never
thrown from methods calls in the test body.

Change-Id: If1dcaf9b733fba19e38bf4cbaa972931ddd93f84
diff --git a/src/test/java/com/googlesource/gerrit/plugins/multisite/consumer/AbstractSubscriberTestBase.java b/src/test/java/com/googlesource/gerrit/plugins/multisite/consumer/AbstractSubscriberTestBase.java
index 1e11bf9..cb1f78e 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/multisite/consumer/AbstractSubscriberTestBase.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/multisite/consumer/AbstractSubscriberTestBase.java
@@ -104,8 +104,7 @@
   }
 
   @Test
-  public void shouldUpdateReplicationMetricsWithLocalEvents()
-      throws IOException, PermissionBackendException, CacheNotFoundException {
+  public void shouldUpdateReplicationMetricsWithLocalEvents() {
     for (Event event : events()) {
       event.instanceId = NODE_INSTANCE_ID;
       when(projectsFilter.matches(any(String.class))).thenReturn(true);
@@ -118,8 +117,7 @@
   }
 
   @Test
-  public void shouldUpdateReplicationMetricsWithNonLocalEvents()
-      throws IOException, PermissionBackendException, CacheNotFoundException {
+  public void shouldUpdateReplicationMetricsWithNonLocalEvents() {
     for (Event event : events()) {
       event.instanceId = INSTANCE_ID;
       when(projectsFilter.matches(any(String.class))).thenReturn(true);