Remove Netty specific API from Vert.x public API

src/main/java/io/vertx/core/Vertx.java

@@ -482,14 +482,6 @@ default Future<String> deployVerticle(String name) {
     return executeBlocking(blockingCodeHandler, true);
   }
 
-  /**
-   * Return the Netty EventLoopGroup used by Vert.x
-   *
-   * @return the EventLoopGroup
-   */
-  @GenIgnore(GenIgnore.PERMITTED_TYPE)
-  EventLoopGroup nettyEventLoopGroup();
-
   /**
    * Like {@link #createSharedWorkerExecutor(String, int)} but with the {@link VertxOptions#setWorkerPoolSize} {@code poolSize}.
    */

src/main/java/io/vertx/core/buffer/Buffer.java

@@ -12,11 +12,10 @@
 package io.vertx.core.buffer;
 
 
-import io.netty.buffer.ByteBuf;
 import io.vertx.codegen.annotations.Fluent;
 import io.vertx.codegen.annotations.GenIgnore;
 import io.vertx.codegen.annotations.VertxGen;
-import io.vertx.core.buffer.impl.BufferImpl;
+import io.vertx.core.buffer.impl.BufferInternal;
 import io.vertx.core.json.Json;
 import io.vertx.core.json.JsonArray;
 import io.vertx.core.json.JsonObject;
@@ -25,7 +24,6 @@
 
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
-import java.util.Objects;
 
 /**
  * Most data is shuffled around inside Vert.x using buffers.
@@ -46,7 +44,7 @@ public interface Buffer extends ClusterSerializable, Shareable {
    * @return the buffer
    */
   static Buffer buffer() {
-    return BufferImpl.buffer();
+    return BufferInternal.buffer();
   }
 
   /**
@@ -59,7 +57,7 @@ static Buffer buffer() {
    * @return the buffer
    */
   static Buffer buffer(int initialSizeHint) {
-    return BufferImpl.buffer(initialSizeHint);
+    return BufferInternal.buffer(initialSizeHint);
   }
 
   /**
@@ -69,7 +67,7 @@ static Buffer buffer(int initialSizeHint) {
    * @return the buffer
    */
   static Buffer buffer(String string) {
-    return BufferImpl.buffer(string);
+    return BufferInternal.buffer(string);
   }
 
   /**
@@ -80,7 +78,7 @@ static Buffer buffer(String string) {
    * @return the buffer
    */
   static Buffer buffer(String string, String enc) {
-    return BufferImpl.buffer(string, enc);
+    return BufferInternal.buffer(string, enc);
   }
 
   /**
@@ -91,30 +89,7 @@ static Buffer buffer(String string, String enc) {
    */
   @GenIgnore(GenIgnore.PERMITTED_TYPE)
   static Buffer buffer(byte[] bytes) {
-    return BufferImpl.buffer(bytes);
-  }
-
-  /**
-   * <p>
-   * Create a new buffer from a Netty {@code ByteBuf}.
-   * <i>Note that</i> the returned buffer is backed by given Netty ByteBuf,
-   * so changes in the returned buffer are reflected in given Netty ByteBuf, and vice-versa.
-   * </p>
-   * <p>
-   * For example, both buffers in the code below share their data:
-   * </p>
-   * <pre>
-   *   Buffer src = Buffer.buffer();
-   *   Buffer clone = Buffer.buffer(src.getByteBuf());
-   * </pre>
-   *
-   * @param byteBuf the Netty ByteBuf
-   * @return the buffer
-   */
-  @GenIgnore(GenIgnore.PERMITTED_TYPE)
-  static Buffer buffer(ByteBuf byteBuf) {
-    Objects.requireNonNull(byteBuf);
-    return BufferImpl.buffer(byteBuf);
+    return BufferInternal.buffer(bytes);
   }
 
   /**
@@ -701,12 +676,4 @@ default Object toJson() {
    */
   Buffer slice(int start, int end);
 
-  /**
-   * Returns the Buffer as a Netty {@code ByteBuf}.
-   *
-   * <p> The returned buffer is a duplicate that maintain its own indices.
-   */
-  @GenIgnore(GenIgnore.PERMITTED_TYPE)
-  ByteBuf getByteBuf();
-
 }