fix: remove empty shade plugin config since iceberg deps are provided by EMR runtime

Author: norrishuang

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-iceberg/pom.xml

@@ -283,28 +283,6 @@ limitations under the License.
 
     <build>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <version>${maven.shade.plugin.version}</version>
-                <executions>
-                    <execution>
-                        <id>shade-flink</id>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                        <configuration>
-                            <shadeTestJar>false</shadeTestJar>
-                            <artifactSet>
-                                <includes>
-                                </includes>
-                            </artifactSet>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>