Update LICENSE/NOTICE

Remove the null check (not necessary anymore)

Author: jbonofre

flight/flight-core/src/main/java/org/apache/arrow/flight/auth/ClientAuthWrapper.java

@@ -76,9 +76,7 @@ public AuthObserver() {
     @Override
     public void onNext(HandshakeResponse value) {
       ByteString payload = value.getPayload();
-      if (payload != null) {
-        messages.add(payload.toByteArray());
-      }
+      messages.add(payload.toByteArray());
     }
 
     private Iterator<byte[]> iter =

flight/flight-core/src/main/java/org/apache/arrow/flight/auth/ServerAuthWrapper.java

@@ -84,9 +84,7 @@ public AuthObserver(StreamObserver<HandshakeResponse> responseObserver) {
     @Override
     public void onNext(HandshakeRequest value) {
       ByteString payload = value.getPayload();
-      if (payload != null) {
-        messages.add(payload.toByteArray());
-      }
+      messages.add(payload.toByteArray());
     }
 
     private Iterator<byte[]> iter =

flight/flight-integration-tests/src/shade/LICENSE.txt

@@ -272,11 +272,11 @@ License: https://www.apache.org/licenses/LICENSE-2.0
 
 --------------------------------------------------------------------------------
 
-This binary artifact contains Google Protobuf 3.25.5.
+This binary artifact contains Google Protobuf 4.30.0.
 
 Copyright: Copyright 2008 Google Inc.  All rights reserved.
 Home page: https://protobuf.dev/
-License: https://github.com/protocolbuffers/protobuf/blob/v3.25.5/LICENSE (BSD)
+License: https://github.com/protocolbuffers/protobuf/blob/v4.30.0/LICENSE (BSD)
 License text:
 
 | Copyright 2008 Google Inc.  All rights reserved.

flight/flight-sql-jdbc-driver/src/shade/LICENSE.txt

@@ -234,11 +234,11 @@ License: https://www.apache.org/licenses/LICENSE-2.0
 
 --------------------------------------------------------------------------------
 
-This binary artifact contains Protobuf 3.25.5.
+This binary artifact contains Protobuf 4.30.0.
 
 Copyright: Copyright 2008 Google Inc.  All rights reserved.
 Home page: https://protobuf.dev/
-License: https://github.com/protocolbuffers/protobuf/blob/v3.25.3/LICENSE (BSD)
+License: https://github.com/protocolbuffers/protobuf/blob/v4.30.0/LICENSE (BSD)
 License text:
 
 | Copyright 2008 Google Inc.  All rights reserved.