Remove download patch 0027

_assets/patches/geth/0027-geth-185-fix-race-in-downloader-cancel.patch

@@ -1,13 +0,0 @@
-diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go
-index eb64f05a..3e8c9cb1 100644
---- a/eth/downloader/downloader.go
-+++ b/eth/downloader/downloader.go
-@@ -230,6 +230,7 @@ func New(mode SyncMode, stateDb ethdb.Database, mux *event.TypeMux, chain BlockC
- 		},
- 		trackStateReq: make(chan *stateReq),
- 	}
-+	dl.cancelWg.Add(1)  // Add a sentinel to avoid getting flagged as a race condition in case Cancel is called before spawnSync
- 	dl.downloads.Add(1) // Add a sentinel value to avoid waiting with zero count and getting a race condition signaled when terminating Downloader before starting sync
- 	go dl.qosTuner()
- 	go dl.stateFetcher()
-