Remove duplicated configuration

Author: deivid-rodriguez

jruby-maven-plugin/src/it/generate-java-and-compile/pom.xml

@@ -43,18 +43,6 @@
         <artifactId>maven-resources-plugin</artifactId>
         <version>3.2.0</version>
       </plugin>
-      <plugin>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.8.1</version>
-        <configuration>
-          <source>11</source>
-          <target>11</target>
-        </configuration>
-      </plugin>
-      <plugin>
-        <artifactId>maven-resources-plugin</artifactId>
-        <version>3.2.0</version>
-      </plugin>
     </plugins>
   </build>