Remove tech preview warning from Oracle doc

Signed-off-by: Thomas Segismont <tsegismont@gmail.com>

Author: tsegismont

vertx-oracle-client/src/main/asciidoc/index.adoc

@@ -1,8 +1,7 @@
 = Reactive Oracle Client
 :PREPARED_PARAMS: `?`
 
-The Reactive Oracle Client is a client for Oracle with a straightforward API focusing on
-scalability and low overhead.
+The Reactive Oracle Client is a client for Oracle with a straightforward API focusing on scalability and low overhead.
 
 *Features*
 
@@ -19,8 +18,6 @@ scalability and low overhead.
 * Prepared queries caching
 * Stored Procedures
 
-WARNING: this module is in tech preview
-
 == Usage
 
 To use the Reactive Oracle Client add the following dependency to the _dependencies_ section of your build descriptor: