[8.8.0] Make remote repo contents cache less spammy

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

@@ -145,6 +145,11 @@ public void beforeCommand(
   }
 
   public void afterCommand() {
+    if (cache == null) {
+      // Not all commands cause beforeCommand to be called, but afterCommand is called
+      // unconditionally.
+      return;
+    }
     this.cache = null;
     this.inputPrefetcher = null;
     this.reporter = null;

src/main/java/com/google/devtools/build/lib/rules/repository/RepositoryDelegatorFunction.java

@@ -268,10 +268,6 @@ public SkyValue compute(SkyKey skyKey, Environment env)
           try {
             if (remoteRepoContentsCache.lookupCache(
                 repositoryName, repoRoot, digestWriter.predeclaredInputHash, env.getListener())) {
-              env.getListener()
-                  .handle(
-                      Event.debug(
-                          "Got %s from the remote repo contents cache".formatted(repositoryName)));
               return new RepositoryDirectoryValue.Success(
                   repoRoot, /* isFetchingDelayed= */ false, excludeRepoFromVendoring);
             }