Remove unused NestedSet expansion.

PiperOrigin-RevId: 379325097
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/starlark/StarlarkActionFactory.java b/src/main/java/com/google/devtools/build/lib/analysis/starlark/StarlarkActionFactory.java
index b057772..de9fcd2 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/starlark/StarlarkActionFactory.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/starlark/StarlarkActionFactory.java
@@ -540,14 +540,10 @@
       Object shadowedActionUnchecked,
       StarlarkAction.Builder builder)
       throws EvalException {
-    Iterable<Artifact> inputArtifacts;
     if (inputs instanceof Sequence) {
-      inputArtifacts = Sequence.cast(inputs, Artifact.class, "inputs");
-      builder.addInputs(inputArtifacts);
+      builder.addInputs(Sequence.cast(inputs, Artifact.class, "inputs"));
     } else {
-      NestedSet<Artifact> inputSet = Depset.cast(inputs, Artifact.class, "inputs");
-      builder.addTransitiveInputs(inputSet);
-      inputArtifacts = inputSet.toList();
+      builder.addTransitiveInputs(Depset.cast(inputs, Artifact.class, "inputs"));
     }
 
     List<Artifact> outputArtifacts = Sequence.cast(outputs, Artifact.class, "outputs");