Removed some unused imports; closed an open file in a unit test

src/main/java/tech/bitgoblin/config/Config.java

@@ -1,6 +1,5 @@
 package tech.bitgoblin.config;
 
-import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;

src/main/java/tech/bitgoblin/io/IOUtils.java

@@ -1,7 +1,5 @@
 package tech.bitgoblin.io;
 
-import tech.bitgoblin.Logger;
-
 import java.io.*;
 
 public class IOUtils {

src/main/java/tech/bitgoblin/transcoder/Transcoder.java

@@ -4,11 +4,7 @@ import java.io.File;
 import java.io.IOException;
 import java.lang.InterruptedException;
 import java.lang.Process;
-import java.nio.file.Files;
-import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.nio.file.StandardCopyOption;
-import java.util.Timer;
 
 import tech.bitgoblin.Logger;
 import tech.bitgoblin.config.Config;

src/test/java/tech/bitgoblin/io/IOUtilsTest.java

@@ -8,7 +8,6 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.RandomAccessFile;
 
@@ -38,6 +37,7 @@ public class IOUtilsTest {
   public void fileShouldBeLocked() throws IOException {
     RandomAccessFile raf = new RandomAccessFile(testFile, "rw");
     assertTrue(IOUtils.isFileLocked(new File(testFile)));
+    raf.close();
   }
 
   @Test