fix imports

Author: ckoegel

src/test/java/com/bandwidth/sdk/unit/api/MultiChannelApiTest.java

@@ -4,12 +4,8 @@
 import com.bandwidth.sdk.ApiException;
 import com.bandwidth.sdk.ApiResponse;
 import com.bandwidth.sdk.Configuration;
-import com.bandwidth.sdk.api.MfaApi;
 import com.bandwidth.sdk.api.MultiChannelApi;
 import com.bandwidth.sdk.auth.HttpBasicAuth;
-import com.bandwidth.sdk.model.CreateMessageRequestError;
-import com.bandwidth.sdk.model.CreateMultiChannelMessageResponse;
-import com.bandwidth.sdk.model.MessagingRequestError;
 import com.bandwidth.sdk.model.MultiChannelChannelListObject;
 import com.bandwidth.sdk.model.MultiChannelChannelListObjectContent;
 import com.bandwidth.sdk.model.MultiChannelMessageChannelEnum;
@@ -22,10 +18,6 @@
 import org.junit.jupiter.api.Test;
 
 import java.time.OffsetDateTime;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 
 import static com.bandwidth.sdk.utils.TestingEnvironmentVariables.*;
 import static org.hamcrest.MatcherAssert.assertThat;