src/share/classes/javax/tools/StandardJavaFileManager.java

@@ -26,11 +26,10 @@
 package javax.tools;
 
 import java.io.File;
 import java.io.IOException;
 import java.util.*;
-import java.util.concurrent.*;
 
 /**
  * File manager based on {@linkplain File java.io.File}.  A common way
  * to obtain an instance of this class is using {@linkplain
  * JavaCompiler#getStandardFileManager