remove unnecessary dependencies for this project

pom.xml

@@ -15,33 +15,8 @@
   <dependencies>
     <dependency>
       <groupId>com.amazonaws</groupId>
-      <artifactId>aws-lambda-java-log4j2</artifactId>
-      <version>1.1.0</version>
-    </dependency>
-    <dependency>
-      <groupId>org.apache.logging.log4j</groupId>
-      <artifactId>log4j-core</artifactId>
-      <version>2.8.2</version>
-    </dependency>
-    <dependency>
-      <groupId>org.apache.logging.log4j</groupId>
-      <artifactId>log4j-api</artifactId>
-      <version>2.8.2</version>
-    </dependency>
-    <dependency>
-      <groupId>com.fasterxml.jackson.core</groupId>
-      <artifactId>jackson-core</artifactId>
-      <version>2.8.5</version>
-    </dependency>
-    <dependency>
-      <groupId>com.fasterxml.jackson.core</groupId>
-      <artifactId>jackson-databind</artifactId>
-      <version>2.8.5</version>
-    </dependency>
-    <dependency>
-      <groupId>com.fasterxml.jackson.core</groupId>
-      <artifactId>jackson-annotations</artifactId>
-      <version>2.8.5</version>
+      <artifactId>aws-lambda-java-core</artifactId>
+      <version>1.2.0</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>

src/main/java/com/mycodefu/ApiGatewayResponse.java

@@ -5,12 +5,6 @@
 import java.util.Collections;
 import java.util.Map;
 
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
-
 public class ApiGatewayResponse {
 
 	private final int statusCode;
@@ -48,10 +42,6 @@ public static Builder builder() {
 
 	public static class Builder {
 
-		private static final Logger LOG = LogManager.getLogger(ApiGatewayResponse.Builder.class);
-
-		private static final ObjectMapper objectMapper = new ObjectMapper();
-
 		private int statusCode = 200;
 		private Map<String, String> headers = Collections.emptyMap();
 		private String rawBody;
@@ -114,13 +104,6 @@ public ApiGatewayResponse build() {
 			String body = null;
 			if (rawBody != null) {
 				body = rawBody;
-			} else if (objectBody != null) {
-				try {
-					body = objectMapper.writeValueAsString(objectBody);
-				} catch (JsonProcessingException e) {
-					LOG.error("failed to serialize object", e);
-					throw new RuntimeException(e);
-				}
 			} else if (binaryBody != null) {
 				body = new String(Base64.getEncoder().encode(binaryBody), StandardCharsets.UTF_8);
 			}

src/main/java/com/mycodefu/Handler.java

@@ -6,9 +6,8 @@
 import java.io.IOException;
 import java.util.*;
 import java.util.List;
-
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
 
 import com.amazonaws.services.lambda.runtime.Context;
 import com.amazonaws.services.lambda.runtime.RequestHandler;
@@ -17,13 +16,11 @@
 
 public class Handler implements RequestHandler<Map<String, Object>, ApiGatewayResponse> {
 
-	private static final Logger LOG = LogManager.getLogger(Handler.class);
 	public static final int DEFAULT_WIDTH = 1024;
 	public static final int DEFAULT_HEIGHT = 768;
 
 	@Override
 	public ApiGatewayResponse handleRequest(Map<String, Object> input, Context context) {
-		LOG.info("received: {}", input);
 
 		Map<String, String> parameters = (Map<String, String>) input.get("queryStringParameters");
 		int width;