Clean up code that directly imports nested classes like Builder, Entry, etc.

PiperOrigin-RevId: 194998981
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/TransitiveTraversalFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/TransitiveTraversalFunction.java
index eb7bd63..fcda217 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/TransitiveTraversalFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/TransitiveTraversalFunction.java
@@ -34,7 +34,6 @@
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import javax.annotation.Nullable;
 
 /**
@@ -69,9 +68,9 @@
       FirstErrorMessageAccumulator accumulator,
       EventHandler eventHandler,
       TargetAndErrorIfAny targetAndErrorIfAny,
-      Iterable<Entry<SkyKey, ValueOrException2<NoSuchPackageException, NoSuchTargetException>>>
+      Iterable<Map.Entry<SkyKey, ValueOrException2<NoSuchPackageException, NoSuchTargetException>>>
           depEntries) {
-    for (Entry<SkyKey, ValueOrException2<NoSuchPackageException, NoSuchTargetException>> entry :
+    for (Map.Entry<SkyKey, ValueOrException2<NoSuchPackageException, NoSuchTargetException>> entry :
         depEntries) {
       TransitiveTraversalValue transitiveTraversalValue;
       try {