[misc] Remove useless exclude

pom.xml

@@ -131,11 +131,6 @@
             <artifactId>cxf-rt-rs-client</artifactId>
             <groupId>org.apache.cxf</groupId>
           </exclusion>
-          <!-- Now merged with jaxb-runtime -->
-          <exclusion>
-            <groupId>org.glassfish.jaxb</groupId>
-            <artifactId>jaxb-core</artifactId>
-          </exclusion>
           <!-- Artifact id changed -->
           <exclusion>
             <groupId>com.sun.activation</groupId>