Revert "feat: ensure large message batches can be received by subscribers (#1133)" (#1135)

This reverts commit 3276d47.

Author: dpcollins-google

google-cloud-pubsublite/src/main/java/com/google/cloud/pubsublite/internal/wire/ServiceClients.java

@@ -37,10 +37,6 @@ public final class ServiceClients {
  private static final int CLIENT_POOL_SIZE =
  Integer.parseInt(System.getProperty("PUBSUB_LITE_CHANNELS_PER_CLIENT", "10"));
 
- // Set maximum inbound message size to 20 MiB to match Cloud Pub/Sub and ensure at least 1 10 MiB
- // message can be received in a subscribe batch.
- private static final int MAX_INBOUND_MESSAGE_SIZE = 20 * 1024 * 1024;
-
  private ServiceClients() {}
 
  private static TransportChannelProvider getTransportChannelProvider() {
@@ -51,7 +47,6 @@ private static TransportChannelProvider getTransportChannelProvider() {
  .setKeepAliveTimeout(Duration.ofMinutes(1))
  .setPoolSize(CLIENT_POOL_SIZE)
  .setExecutor(SystemExecutors.getFuturesExecutor())
- .setMaxInboundMessageSize(MAX_INBOUND_MESSAGE_SIZE)
  .build();
  }