Optimize TopicsImpl fix made in apache#13434 (apache#13436)

- align with recent refactoring apache#13388

pulsar-client-admin/src/main/java/org/apache/pulsar/client/admin/internal/TopicsImpl.java

@@ -32,9 +32,6 @@
 import java.util.Set;
 import java.util.TreeMap;
 import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.TimeoutException;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import javax.ws.rs.client.Entity;
@@ -520,16 +517,7 @@ public void failed(Throwable throwable) {
 
     @Override
     public Map<Integer, MessageId> terminatePartitionedTopic(String topic) throws PulsarAdminException {
-        try {
-            return terminatePartitionedTopicAsync(topic).get(this.readTimeoutMs, TimeUnit.MILLISECONDS);
-        } catch (ExecutionException e) {
-            throw (PulsarAdminException) e.getCause();
-        } catch (InterruptedException e) {
-            Thread.currentThread().interrupt();
-            throw new PulsarAdminException(e);
-        } catch (TimeoutException e) {
-            throw new PulsarAdminException.TimeoutException(e);
-        }
+        return sync(() -> terminatePartitionedTopicAsync(topic));
     }
 
     @Override