Remove the TODO which was fixed in https://github.com/bazelbuild/bazel/commit/31b6880c254b099d2e7feb27708b6d52503c6148.

RELNOTES: None.
PiperOrigin-RevId: 315031565

src/main/java/com/google/devtools/build/lib/skyframe/ActionMetadataHandler.java

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ActionMetadataHandler.java b/src/main/java/com/google/devtools/build/lib/skyframe/ActionMetadataHandler.java
index 885cadba..7b3ff64 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/ActionMetadataHandler.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ActionMetadataHandler.java
@@ -382,7 +382,6 @@
     // avoid duplicate chmod calls.
     store.injectedFiles().add(output);
 
-    // TODO(jhorvitz): This unnecessarily calls getFastDigest even though we know the digest.
     return constructFileArtifactValue(
         output, FileStatusWithDigestAdapter.adapt(statNoFollow), digest);
   }