remove explicit plugin definition

patterns-modules/idd/pom.xml

@@ -7,16 +7,7 @@
     <version>1.0</version>
     <name>idd</name>
     <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>9</source>
-                    <target>9</target>
-                </configuration>
-            </plugin>
-        </plugins>
+        
     </build>
     <packaging>jar</packaging>