rm unneeded plug-in from maven

runtime/Java/pom.xml

@@ -62,22 +62,6 @@
           </archive>
         </configuration>
       </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-shade-plugin</artifactId>
-        <version>2.3</version>
-        <executions>
-          <execution>
-            <phase>package</phase>
-            <configuration>
-              <dependencyReducedPomLocation>${project.build.directory}/dependency-reduced-pom.xml</dependencyReducedPomLocation>
-            </configuration>
-            <goals>
-              <goal>shade</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
     </plugins>
   </build>
 </project>