clean unused

src/main/java/com/clevercloud/biscuitpulsar/AuthenticationBiscuit.java

@@ -4,7 +4,6 @@
 import org.apache.pulsar.client.api.Authentication;
 import org.apache.pulsar.client.api.AuthenticationDataProvider;
 import org.apache.pulsar.client.api.EncodedAuthenticationParameterSupport;
-import org.apache.pulsar.client.api.PulsarClientException;
 
 import java.io.IOException;
 import java.net.URI;
@@ -31,7 +30,7 @@ public AuthenticationBiscuit(Supplier<String> biscuitSupplier) {
     }
 
     @Override
-    public void close() throws IOException {
+    public void close() {
         // noop
     }
 
@@ -41,7 +40,7 @@ public String getAuthMethodName() {
     }
 
     @Override
-    public AuthenticationDataProvider getAuthData() throws PulsarClientException {
+    public AuthenticationDataProvider getAuthData() {
         return new AuthenticationDataBiscuit(biscuitSupplier);
     }
 
@@ -72,7 +71,7 @@ public void configure(Map<String, String> authParams) {
     }
 
     @Override
-    public void start() throws PulsarClientException {
+    public void start() {
         // noop
     }
 }

src/main/java/com/clevercloud/biscuitpulsar/AuthenticationProviderBiscuit.java

@@ -17,7 +17,6 @@
 import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;
 import java.security.SignatureException;
-import java.util.Base64;
 
 public class AuthenticationProviderBiscuit implements AuthenticationProvider {
     private static final Logger log = LoggerFactory.getLogger(AuthenticationProviderBiscuit.class);