Sync plugin versions for build-conf

- apply checkstyle to self

Change-Id: Ib2b429bfbef0a273fe949f312875e8906d2b0310
diff --git a/tools/build/conf/src/main/java/org/onosproject/buckdaemon/BuckTaskContext.java b/tools/build/conf/src/main/java/org/onosproject/buckdaemon/BuckTaskContext.java
index 2cfb35d..8dabfd2 100644
--- a/tools/build/conf/src/main/java/org/onosproject/buckdaemon/BuckTaskContext.java
+++ b/tools/build/conf/src/main/java/org/onosproject/buckdaemon/BuckTaskContext.java
@@ -25,8 +25,6 @@
 import java.io.InputStreamReader;
 import java.util.List;
 
-import static com.google.common.base.Preconditions.checkArgument;
-
 /**
  * Context for executing a single Buck task.
  */
@@ -74,6 +72,8 @@
 
     /**
      * Returns the symbolic task name.
+     *
+     * @return symbolic task name
      */
     public String taskName() {
         return taskName;