diff --git a/core-java-modules/core-java-exceptions-3/pom.xml b/core-java-modules/core-java-exceptions-3/pom.xml
index 19996f85af..b909572afe 100644
--- a/core-java-modules/core-java-exceptions-3/pom.xml
+++ b/core-java-modules/core-java-exceptions-3/pom.xml
@@ -26,19 +26,6 @@
         </dependency>
     </dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>11</source>
-                    <target>11</target>
-                    <compilerVersion>11</compilerVersion>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
     <properties>
         <!-- testing -->
         <assertj-core.version>3.10.0</assertj-core.version>
diff --git a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingJava10Demo.java b/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingJava10Demo.java
deleted file mode 100644
index 1a32dcec4f..0000000000
--- a/core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/CopyListUsingJava10Demo.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package com.baeldung;
-
-import java.util.Arrays;
-import java.util.List;
-
-public class CopyListUsingJava10Demo {
-    static List<Integer> copyList(List<Integer> source) {
-        return List.copyOf(source);
-    }
-
-    public static void main(String[] args) {
-        List<Integer> source = Arrays.asList(11, 22, 33);
-
-        List<Integer> destination = copyList(source);
-
-        System.out.println("copy = " + destination);
-    }
-}