diff --git a/apache-geode/src/main/java/com/baeldung/geode/functions/CustomerWithMaxAge.java b/apache-geode/src/main/java/com/baeldung/geode/functions/CustomerWithMaxAge.java
deleted file mode 100644
index ef729a1ac2..0000000000
--- a/apache-geode/src/main/java/com/baeldung/geode/functions/CustomerWithMaxAge.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package com.baeldung.geode.functions;
-
-import com.baeldung.geode.Customer;
-import org.apache.geode.cache.Region;
-import org.apache.geode.cache.execute.Function;
-import org.apache.geode.cache.execute.FunctionContext;
-import org.apache.geode.cache.execute.RegionFunctionContext;
-
-import java.util.Comparator;
-import java.util.Map;
-import java.util.Optional;
-
-public class CustomerWithMaxAge implements Function<Customer> {
-
-    public static final String ID = CustomerWithMaxAge.class.getSimpleName();
-
-    private static final long serialVersionUID = -6023734758827953742L;
-
-    @Override
-    public void execute(FunctionContext<Customer> context) {
-        RegionFunctionContext regionContext = (RegionFunctionContext) context;
-        Region<Integer, Customer> region = regionContext.getDataSet();
-
-        Comparator<Customer> ageComparator = Comparator.comparing(Customer::getAge);
-
-        Optional<Customer> customer = region.entrySet()
-            .stream()
-            .map(Map.Entry::getValue)
-            .max(ageComparator);
-
-        customer.ifPresent(c -> context.getResultSender()
-            .lastResult(c));
-    }
-
-    @Override
-    public String getId() {
-        return ID;
-    }
-}
diff --git a/apache-geode/src/main/java/com/baeldung/geode/functions/PrimeNumber.java b/apache-geode/src/main/java/com/baeldung/geode/functions/PrimeNumber.java
deleted file mode 100644
index 411816348a..0000000000
--- a/apache-geode/src/main/java/com/baeldung/geode/functions/PrimeNumber.java
+++ /dev/null
@@ -1,49 +0,0 @@
-package com.baeldung.geode.functions;
-
-import org.apache.geode.cache.Region;
-import org.apache.geode.cache.execute.Function;
-import org.apache.geode.cache.execute.FunctionContext;
-import org.apache.geode.cache.execute.RegionFunctionContext;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.Set;
-
-public class PrimeNumber implements Function {
-
-    public static final String ID = PrimeNumber.class.getSimpleName();
-
-    @Override
-    public void execute(FunctionContext context) {
-        RegionFunctionContext regionContext = (RegionFunctionContext) context;
-        Region<Integer, String> region = regionContext.getDataSet();
-
-        List<Integer> primes = new ArrayList<>();
-        Set<Integer> keys = region.keySet();
-        for (Integer key : keys) {
-            if (isPrime(key)) {
-                primes.add(key);
-            }
-        }
-        Collections.sort(primes);
-
-        context.getResultSender()
-            .lastResult(primes);
-    }
-
-    @Override
-    public String getId() {
-        return ID;
-    }
-
-    private boolean isPrime(int number) {
-        int limit = (int) Math.floor(Math.sqrt(number));
-        for (int divisor = 2; divisor <= limit; ++divisor) {
-            if (number % divisor == 0) {
-                return false;
-            }
-        }
-        return true;
-    }
-}
diff --git a/apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java b/apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java
index eb9affde8e..b96d2c9b6a 100644
--- a/apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java
+++ b/apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java
@@ -1,7 +1,5 @@
 package com.baeldung.geode;
 
-import com.baeldung.geode.functions.CustomerWithMaxAge;
-import com.baeldung.geode.functions.PrimeNumber;
 import com.baeldung.geode.functions.UpperCaseNames;
 import org.apache.geode.cache.Region;
 import org.apache.geode.cache.client.ClientCache;
@@ -9,21 +7,19 @@ import org.apache.geode.cache.client.ClientCacheFactory;
 import org.apache.geode.cache.client.ClientRegionShortcut;
 import org.apache.geode.cache.execute.Execution;
 import org.apache.geode.cache.execute.FunctionService;
-import org.apache.geode.cache.execute.ResultCollector;
 import org.apache.geode.cache.query.*;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import java.util.*;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
 
 public class GeodeSamplesIntegrationTest {