removed setting the secureRandom attribute for the Aes + RSA keyrings since secureRandom should now be initialized by default. I also removed all the unused imports

Author: Anirav Kareddy

src/test/java/software/amazon/encryption/s3/S3EncryptionClientCompatibilityTest.java

@@ -15,15 +15,9 @@
 import com.amazonaws.services.s3.model.EncryptedPutObjectRequest;
 import com.amazonaws.services.s3.model.EncryptionMaterials;
 import com.amazonaws.services.s3.model.EncryptionMaterialsProvider;
-import com.amazonaws.services.s3.model.GetObjectMetadataRequest;
-import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest;
-import com.amazonaws.services.s3.model.InitiateMultipartUploadResult;
 import com.amazonaws.services.s3.model.KMSEncryptionMaterials;
 import com.amazonaws.services.s3.model.KMSEncryptionMaterialsProvider;
-import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.StaticEncryptionMaterialsProvider;
-import com.amazonaws.services.s3.model.StorageClass;
-import com.amazonaws.services.s3.model.UploadObjectRequest;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.core.ResponseBytes;
@@ -34,25 +28,20 @@
 import software.amazon.awssdk.services.s3.model.MetadataDirective;
 import software.amazon.awssdk.services.s3.model.PutObjectRequest;
 import software.amazon.encryption.s3.internal.InstructionFileConfig;
-import software.amazon.encryption.s3.utils.BoundedInputStream;
 
 import javax.crypto.KeyGenerator;
 import javax.crypto.SecretKey;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.security.KeyPair;
 import java.security.KeyPairGenerator;
 import java.security.NoSuchAlgorithmException;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.concurrent.ExecutionException;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
-import static software.amazon.encryption.s3.S3EncryptionClient.builder;
 import static software.amazon.encryption.s3.S3EncryptionClient.withAdditionalConfiguration;
 import static software.amazon.encryption.s3.utils.S3EncryptionClientTestResources.BUCKET;
 import static software.amazon.encryption.s3.utils.S3EncryptionClientTestResources.KMS_KEY_ID;