Removed kotlin stdlib exclusion from Vert.x Web GraphQL POM

Dependency issue resolved by #2798

Signed-off-by: Thomas Segismont <[email protected]>

Author: tsegismont

vertx-web-graphql/pom.xml

@@ -43,12 +43,6 @@
       <artifactId>graphql-java</artifactId>
       <version>${graphql.java.version}</version>
       <exclusions>
-        <!-- Can be removed after a new data loader release -->
-        <!-- See https://github.com/graphql-java/java-dataloader/issues/227 -->
-        <exclusion>
-          <groupId>org.jetbrains.kotlin</groupId>
-          <artifactId>kotlin-stdlib</artifactId>
-        </exclusion>
         <exclusion>
           <groupId>org.reactivestreams</groupId>
           <artifactId>reactive-streams</artifactId>