Remove un-necessary internal promise creation from handler

Author: vietj

vertx-sql-client/src/main/java/io/vertx/sqlclient/impl/PoolImpl.java

@@ -116,11 +116,6 @@ protected ContextInternal context() {
     return vertx.getOrCreateContext();
   }
 
-  @Override
-  protected <T> PromiseInternal<T> promise(Handler<AsyncResult<T>> handler) {
-    return vertx.promise(handler);
-  }
-
   @Override
   public Future<SqlConnection> getConnection() {
     ContextInternal current = vertx.getOrCreateContext();

vertx-sql-client/src/main/java/io/vertx/sqlclient/impl/SqlClientBase.java

@@ -57,8 +57,6 @@ public SqlClientBase(Driver driver, QueryTracer tracer, ClientMetrics metrics) {
 
   protected abstract <T> PromiseInternal<T> promise();
 
-  protected abstract <T> PromiseInternal<T> promise(Handler<AsyncResult<T>> handler);
-
   @Override
   public Driver driver() {
     return driver;
@@ -198,11 +196,6 @@ protected <T> PromiseInternal<T> promise() {
       return SqlClientBase.this.promise();
     }
 
-    @Override
-    protected <T> PromiseInternal<T> promise(Handler<AsyncResult<T>> handler) {
-      return SqlClientBase.this.promise(handler);
-    }
-
     @Override
     public <R> Future<R> schedule(ContextInternal context, CommandBase<R> cmd) {
       return composite.add(context, cmd);

vertx-sql-client/src/main/java/io/vertx/sqlclient/impl/SqlConnectionBase.java

@@ -97,11 +97,6 @@ protected <T> PromiseInternal<T> promise() {
     return context.promise();
   }
 
-  @Override
-  protected <T> PromiseInternal<T> promise(Handler<AsyncResult<T>> handler) {
-    return context.promise(handler);
-  }
-
   @Override
   public void handleClosed() {
     Handler<Void> handler = closeHandler;