Jackson is now a require dependency, remove it from the docs

Author: swallez

docs/reference/getting-started.md

@@ -22,7 +22,6 @@ This page guides you through the installation process of the Java client, shows
 ```groovy
 dependencies {
     implementation 'co.elastic.clients:elasticsearch-java:9.0.0-beta1'
-    implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.0'
 }
 ```
 
@@ -41,12 +40,6 @@ In the `pom.xml` of your project, add the following repository definition and de
       <version>9.0.0-beta1</version>
     </dependency>
 
-    <dependency>
-      <groupId>com.fasterxml.jackson.core</groupId>
-      <artifactId>jackson-databind</artifactId>
-      <version>2.17.0</version>
-    </dependency>
-
   </dependencies>
 </project>
 ```

docs/reference/installation.md

@@ -18,7 +18,6 @@ Releases are hosted on [Maven Central](https://search.maven.org/search?q=g:co.el
 ```groovy
 dependencies {
     implementation 'co.elastic.clients:elasticsearch-java:9.0.0-beta1'
-    implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.0'
 }
 ```
 
@@ -37,12 +36,6 @@ In the `pom.xml` of your project, add the following repository definition and de
       <version>9.0.0-beta1</version>
     </dependency>
 
-    <dependency>
-      <groupId>com.fasterxml.jackson.core</groupId>
-      <artifactId>jackson-databind</artifactId>
-      <version>2.17.0</version>
-    </dependency>
-
   </dependencies>
 </project>
 ```

java-client/src/test/java/co/elastic/clients/testkit/ModelTestCase.java

@@ -50,7 +50,7 @@ protected enum JsonImpl { Jsonb, Jackson, Simple };
     protected final JsonpMapper mapper;
 
     private static JsonImpl chooseJsonImpl(EnumSet<JsonImpl> jsonImplCandidates, int rand) {
-        // Converting an EnumSet to an array always uses the same order.
+        // Converting an EnumSet an array always uses the same order.
         return jsonImplCandidates.toArray(new JsonImpl[jsonImplCandidates.size()])[rand % jsonImplCandidates.size()];
     }