Fix comment that recently became stale.

RELNOTES: None
PiperOrigin-RevId: 209771508

src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java

diff --git a/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java b/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java
index 2305aa0..048cd93 100644
--- a/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java
+++ b/src/main/java/com/google/devtools/build/lib/vfs/FileSystem.java
@@ -246,9 +246,9 @@
   }
 
   /**
-   * Gets a fast digest for the given path and hash function type, or {@code null} if there isn't
-   * one available or the filesystem doesn't support them. This digest should be suitable for
-   * detecting changes to the file.
+   * Gets a fast digest for the given path, or {@code null} if there isn't one available or the
+   * filesystem doesn't support them. This digest should be suitable for detecting changes to the
+   * file.
    */
   protected byte[] getFastDigest(Path path) throws IOException {
     return null;