Gardening: Remove cruft accidentally added in previous commit

Removed the  dependencyManagement block accidentally
added to the example project POM in commit
25fe82b

Author: dnault

couchbase-analytics-java-client/examples/maven-project-template/pom.xml

@@ -33,18 +33,6 @@
         </repository>
     </repositories>
 
-    <dependencyManagement>
-        <dependencies>
-            <dependency>
-                <groupId>com.fasterxml.jackson</groupId>
-                <artifactId>jackson-bom</artifactId>
-                <version>2.13.0</version>
-                <type>pom</type>
-                <scope>import</scope>
-            </dependency>
-        </dependencies>
-    </dependencyManagement>
-
     <dependencies>
         <dependency>
             <groupId>com.couchbase.client</groupId>