optimize imports

Author: civitaspo

src/main/java/org/embulk/output/sftp/SftpFileOutput.java

@@ -1,15 +1,10 @@
 package org.embulk.output.sftp;
 
 import com.google.common.base.Throwables;
-import io.netty.util.internal.logging.Slf4JLoggerFactory;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.apache.commons.vfs2.FileObject;
 import org.apache.commons.vfs2.FileSystemException;
-import org.apache.commons.vfs2.FileSystemManager;
 import org.apache.commons.vfs2.FileSystemOptions;
 import org.apache.commons.vfs2.Selectors;
-import org.apache.commons.vfs2.VFS;
 import org.apache.commons.vfs2.impl.StandardFileSystemManager;
 import org.apache.commons.vfs2.provider.sftp.IdentityInfo;
 import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder;
@@ -20,14 +15,13 @@
 import org.embulk.spi.TransactionalFileOutput;
 import org.slf4j.Logger;
 
-import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.net.URI;
 import java.net.URISyntaxException;
 
-import static org.embulk.output.sftp.SftpFileOutputPlugin.*;
+import static org.embulk.output.sftp.SftpFileOutputPlugin.PluginTask;
 
 /**
  * Created by takahiro.nakayama on 10/20/15.

src/main/java/org/embulk/output/sftp/SftpFileOutputPlugin.java

@@ -1,35 +1,18 @@
 package org.embulk.output.sftp;
 
 import com.google.common.base.Optional;
-import com.google.common.base.Throwables;
-import org.apache.commons.logging.Log;
-import org.apache.commons.vfs2.FileObject;
-import org.apache.commons.vfs2.FileSystemException;
-import org.apache.commons.vfs2.FileSystemManager;
-import org.apache.commons.vfs2.FileSystemOptions;
-import org.apache.commons.vfs2.VFS;
-import org.apache.commons.vfs2.impl.StandardFileSystemManager;
-import org.apache.commons.vfs2.provider.sftp.IdentityInfo;
-import org.apache.commons.vfs2.provider.sftp.SftpFileSystemConfigBuilder;
 import org.embulk.config.Config;
 import org.embulk.config.ConfigDefault;
 import org.embulk.config.ConfigDiff;
 import org.embulk.config.ConfigSource;
 import org.embulk.config.Task;
 import org.embulk.config.TaskReport;
 import org.embulk.config.TaskSource;
-import org.embulk.spi.Buffer;
 import org.embulk.spi.Exec;
 import org.embulk.spi.FileOutputPlugin;
 import org.embulk.spi.TransactionalFileOutput;
 import org.slf4j.Logger;
 
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.net.URI;
-import java.net.URISyntaxException;
 import java.util.List;
 
 public class SftpFileOutputPlugin