Remove obsolete doc.

The function was removed in https://github.com/bazelbuild/bazel/commit/8e1a6e994c867a5a9fe7497056e31e393513466b.

PiperOrigin-RevId: 632457087
Change-Id: Ie27e172ebe65ce308e8edc22121bd99f97109579
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ArtifactNestedSetValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/ArtifactNestedSetValue.java
index 7485971..0daf84f 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/ArtifactNestedSetValue.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ArtifactNestedSetValue.java
@@ -18,8 +18,7 @@
 import com.google.devtools.build.skyframe.NotComparableSkyValue;
 
 /**
- * Represent a "promise" that the Artifacts under a NestedSet are evaluated by Skyframe and are
- * available from {@link ArtifactNestedSetFunction#getValueForKey}.
+ * Represent a "promise" that the Artifacts under a NestedSet are evaluated by Skyframe.
  *
  * <p>Implements {@link NotComparableSkyValue} to prohibit value-based change pruning.
  */