Address Gemini suggestions for VirtualActionInputBlob

src/main/java/com/google/devtools/build/lib/remote/RemoteExecutionCache.java

@@ -240,8 +240,9 @@ public InputStream get() {
                 try (pipedOut) {
                   virtualActionInput.writeTo(pipedOut);
                 } catch (IOException e) {
-                  throw new IllegalStateException(
-                      "writeTo is  not expected to throw as pipedOut doesn't", e);
+                  // Since VirtualActionInput#writeTo only throws when pipedOut does, this means
+                  // that the reader has closed pipedIn early, perhaps due to interruption. Since
+                  // the reader is gone, there is no way to propagate this exception back.
                 }
               });
       return pipedIn;

src/main/java/com/google/devtools/build/lib/remote/common/RemoteCacheClient.java

@@ -96,7 +96,7 @@ ListenableFuture<Void> downloadBlob(
    * A supplier for the data comprising a BLOB.
    *
    * <p>As blobs can be large and may need to be kept in memory, consumers should call {@link #get}
-   * as late as possible and close the blob as soon as they are done with it.
+   * as late as possible.
    */
   @FunctionalInterface
   interface Blob {