Removed unneeded method from PackInput

Method `#messageBoundaryHook()` was only useful for blocking
connections is is unused for netty-based async IO.

Author: lutovich

driver/src/main/java/org/neo4j/driver/internal/async/inbound/ByteBufInput.java

@@ -88,18 +88,6 @@ public byte peekByte()
         return buf.getByte( buf.readerIndex() );
     }
 
-    @Override
-    public Runnable messageBoundaryHook()
-    {
-        return new Runnable()
-        {
-            @Override
-            public void run()
-            {
-            }
-        };
-    }
-
     private void assertNotStarted()
     {
         if ( buf != null )

driver/src/main/java/org/neo4j/driver/internal/messaging/PackStreamMessageFormatV1.java

@@ -84,7 +84,7 @@ public MessageFormat.Writer newWriter( PackOutput output, boolean byteArraySuppo
     @Override
     public MessageFormat.Reader newReader( PackInput input )
     {
-        return new Reader( input, input.messageBoundaryHook() );
+        return new Reader( input );
     }
 
     @Override
@@ -370,12 +370,10 @@ private void packProperties( Entity entity ) throws IOException
     public static class Reader implements MessageFormat.Reader
     {
         private final PackStream.Unpacker unpacker;
-        private final Runnable onMessageComplete;
 
-        public Reader( PackInput input, Runnable onMessageComplete )
+        public Reader( PackInput input )
         {
             unpacker = new PackStream.Unpacker( input );
-            this.onMessageComplete = onMessageComplete;
         }
 
         @Override
@@ -429,19 +427,16 @@ public void read( MessageHandler handler ) throws IOException
         private void unpackResetMessage( MessageHandler handler ) throws IOException
         {
             handler.handleResetMessage();
-            onMessageComplete.run();
         }
 
         private void unpackInitMessage( MessageHandler handler ) throws IOException
         {
             handler.handleInitMessage( unpacker.unpackString(), unpackMap() );
-            onMessageComplete.run();
         }
 
         private void unpackIgnoredMessage( MessageHandler output ) throws IOException
         {
             output.handleIgnoredMessage();
-            onMessageComplete.run();
         }
 
         private void unpackFailureMessage( MessageHandler output ) throws IOException
@@ -450,34 +445,29 @@ private void unpackFailureMessage( MessageHandler output ) throws IOException
             String code = params.get( "code" ).asString();
             String message = params.get( "message" ).asString();
             output.handleFailureMessage( code, message );
-            onMessageComplete.run();
         }
 
         private void unpackRunMessage( MessageHandler output ) throws IOException
         {
             String statement = unpacker.unpackString();
             Map<String,Value> params = unpackMap();
             output.handleRunMessage( statement, params );
-            onMessageComplete.run();
         }
 
         private void unpackDiscardAllMessage( MessageHandler output ) throws IOException
         {
             output.handleDiscardAllMessage();
-            onMessageComplete.run();
         }
 
         private void unpackPullAllMessage( MessageHandler output ) throws IOException
         {
             output.handlePullAllMessage();
-            onMessageComplete.run();
         }
 
         private void unpackSuccessMessage( MessageHandler output ) throws IOException
         {
             Map<String,Value> map = unpackMap();
             output.handleSuccessMessage( map );
-            onMessageComplete.run();
         }
 
         private void unpackRecordMessage(MessageHandler output) throws IOException
@@ -489,7 +479,6 @@ private void unpackRecordMessage(MessageHandler output) throws IOException
                 fields[i] = unpackValue();
             }
             output.handleRecordMessage( fields );
-            onMessageComplete.run();
         }
 
         private Value unpackValue() throws IOException

driver/src/main/java/org/neo4j/driver/internal/packstream/PackInput.java

@@ -49,7 +49,4 @@ public interface PackInput
 
     /** Get the next byte without forwarding the internal pointer */
     byte peekByte() throws IOException;
-
-    // todo: remove this method! it is temporary!
-    Runnable messageBoundaryHook();
 }

driver/src/test/java/org/neo4j/driver/internal/packstream/BufferedChannelInput.java

@@ -114,18 +114,6 @@ public byte peekByte() throws IOException
         return buffer.get( buffer.position() );
     }
 
-    @Override
-    public Runnable messageBoundaryHook()
-    {
-        return new Runnable()
-        {
-            @Override
-            public void run()
-            {
-            }
-        };
-    }
-
     private boolean attempt( int numBytes ) throws IOException
     {
         if ( buffer.remaining() >= numBytes )