remove dead code, make the Azure Storage performance warnings less aggressive

src/DurableTask.Netherite/StorageProviders/Faster/AzureBlobs/AzureStorageDevice.cs

@@ -283,7 +283,7 @@ namespace DurableTask.Netherite.Faster
 
                         stopwatch.Stop();
 
-                        if (stopwatch.ElapsedMilliseconds > 1000)
+                        if (stopwatch.ElapsedMilliseconds > 1000 + length / 1000)
                         {
                             this.BlobManager?.TraceHelper.FasterPerfWarning($"CloudPageBlob.WritePagesAsync took {stopwatch.ElapsedMilliseconds:f1}ms, which is excessive; target={blob.Name} length={length} destinationAddress={destinationAddress + offset}");
                         }
@@ -362,7 +362,7 @@ namespace DurableTask.Netherite.Faster
                         stopwatch.Stop();
                         this.BlobManager?.StorageTracer?.FasterStorageProgress($"finished download target={blob.Name} readLength={readLength} sourceAddress={sourceAddress} latencyMs={stopwatch.Elapsed.TotalMilliseconds:F1}");
 
-                        if (stopwatch.ElapsedMilliseconds > 1000)
+                        if (stopwatch.ElapsedMilliseconds > 1000 + readLength / 1000)
                         {
                             this.BlobManager?.TraceHelper.FasterPerfWarning($"CloudPageBlob.DownloadRangeToStreamAsync took {stopwatch.ElapsedMilliseconds / 1000}s, which is excessive; target={blob.Name} readLength={readLength} sourceAddress={sourceAddress}");
                         }

src/DurableTask.Netherite/StorageProviders/Faster/AzureBlobs/BlobEntry.cs

@@ -97,7 +97,7 @@ namespace DurableTask.Netherite.Faster
                         stopwatch.Stop();
                         this.azureStorageDevice.BlobManager?.StorageTracer?.FasterStorageProgress($"finished create page blob target={pageBlob.Name} size={size} latencyMs={stopwatch.Elapsed.TotalMilliseconds:F1}");
 
-                        if (stopwatch.ElapsedMilliseconds > 1000)
+                        if (stopwatch.ElapsedMilliseconds > 3000)
                         {
                             this.azureStorageDevice.BlobManager?.TraceHelper.FasterPerfWarning($"CloudPageBlob.CreateAsync took {stopwatch.ElapsedMilliseconds / 1000}s, which is excessive; target={pageBlob.Name} size={size}");
                         }

src/DurableTask.Netherite/StorageProviders/Faster/FasterStorage.cs

@@ -206,7 +206,6 @@ namespace DurableTask.Netherite.Faster
             await this.blobManager.StopAsync().ConfigureAwait(false);
         }
 
-
         public void SubmitExternalEvents(IList<PartitionEvent> evts)
         {
             this.logWorker.SubmitExternalEvents(evts);
@@ -234,19 +233,5 @@ namespace DurableTask.Netherite.Faster
                 this.storeWorker.Notify();
             }
         }
-
-        async Task TestStorageLatency()
-        {
-            Stopwatch stopwatch = new Stopwatch();
-            var blob = this.blobManager.BlockBlobContainer.GetBlockBlobReference("test");
-            var text = DateTime.UtcNow.ToString("o");
-            stopwatch.Start();
-            await blob.UploadTextAsync(text).ConfigureAwait(BlobManager.CONFIGURE_AWAIT_FOR_STORAGE_CALLS);
-            stopwatch.Stop();
-            if (stopwatch.ElapsedMilliseconds > 1000)
-            {
-                this.TraceHelper.FasterPerfWarning($"CloudBlockBlob.UploadTextAsync took {stopwatch.ElapsedMilliseconds / 1000}s, which is excessive; target={blob} content={text}");
-            }
-        }
     }
 }