Remove non needed imports

plugins/discovery-ec2/src/test/java/org/elasticsearch/cloud/aws/AwsEc2ServiceImplTests.java

@@ -24,11 +24,9 @@ import com.amazonaws.Protocol;
 import com.amazonaws.auth.AWSCredentials;
 import com.amazonaws.auth.AWSCredentialsProvider;
 import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
-import com.amazonaws.util.StringUtils;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.test.ESTestCase;
 
-import static com.amazonaws.SDKGlobalConfiguration.ACCESS_KEY_SYSTEM_PROPERTY;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.is;

plugins/repository-s3/src/test/java/org/elasticsearch/cloud/aws/AwsS3ServiceImplTests.java

@@ -24,21 +24,10 @@ import com.amazonaws.Protocol;
 import com.amazonaws.auth.AWSCredentials;
 import com.amazonaws.auth.AWSCredentialsProvider;
 import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
-import com.amazonaws.auth.EnvironmentVariableCredentialsProvider;
-import com.amazonaws.auth.InstanceProfileCredentialsProvider;
-import com.amazonaws.auth.SystemPropertiesCredentialsProvider;
-import com.amazonaws.auth.profile.ProfileCredentialsProvider;
-import com.amazonaws.util.StringUtils;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.repositories.s3.S3Repository;
 import org.elasticsearch.test.ESTestCase;
 
-import static com.amazonaws.SDKGlobalConfiguration.ACCESS_KEY_ENV_VAR;
-import static com.amazonaws.SDKGlobalConfiguration.ACCESS_KEY_SYSTEM_PROPERTY;
-import static com.amazonaws.SDKGlobalConfiguration.ALTERNATE_ACCESS_KEY_ENV_VAR;
-import static com.amazonaws.SDKGlobalConfiguration.ALTERNATE_SECRET_KEY_ENV_VAR;
-import static com.amazonaws.SDKGlobalConfiguration.SECRET_KEY_ENV_VAR;
-import static com.amazonaws.SDKGlobalConfiguration.SECRET_KEY_SYSTEM_PROPERTY;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.is;