Revove unused import of TreeSet in InitDatabase

Change-Id: I38ad8874aaed7feff85a68519145caa7f5b7efaa
diff --git a/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/InitDatabase.java b/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/InitDatabase.java
index 0336dda..aa413d6 100644
--- a/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/InitDatabase.java
+++ b/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/InitDatabase.java
@@ -33,7 +33,6 @@
 import java.lang.annotation.Annotation;
 import java.util.List;
 import java.util.Set;
-import java.util.TreeSet;
 
 /** Initialize the {@code database} configuration section. */
 @Singleton