Removed unused imports

Author: WesleyRosenblum

src/main/java/com/amazonaws/encryptionsdk/internal/JceKeyCipher.java

@@ -13,15 +13,13 @@
 
 package com.amazonaws.encryptionsdk.internal;
 
-import com.amazonaws.encryptionsdk.CryptoAlgorithm;
 import com.amazonaws.encryptionsdk.EncryptedDataKey;
 import com.amazonaws.encryptionsdk.exception.AwsCryptoException;
 import com.amazonaws.encryptionsdk.model.KeyBlob;
 import org.apache.commons.lang3.ArrayUtils;
 
 import javax.crypto.Cipher;
 import javax.crypto.SecretKey;
-import javax.crypto.spec.SecretKeySpec;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.security.GeneralSecurityException;