.github/workflows: remove fuzzit.dev

All fuzzit.dev jobs become broken recently, see e.g.:
https://github.com/google/syzkaller/pull/2351/checks?check_run_id=1601794199
...
{"status":"Status: Downloaded newer image for gcr.io/fuzzit-public/stretch-llvm8:64bdedf"}
Downloading fuzzit cli/agent...
Error: Process completed with exit code 1.

https://github.com/fuzzitdev/fuzzit is archived now and the README says:
"the standalone service will soon be deperecated".

So I guess it's time to remove fuzzit.dev integration.

1 files changed, 0 insertions, 1 deletions

diff --git a/README.md b/README.md
index 4e8185cd4..881c353da 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # syzkaller - kernel fuzzer
 
 [![CI Status](https://github.com/google/syzkaller/workflows/ci/badge.svg)](https://github.com/google/syzkaller/actions?query=workflow/ci)
-[![fuzzit](https://app.fuzzit.dev/badge?org_id=syzkaller=master)](https://fuzzit.dev)
 [![OSS-Fuzz](https://oss-fuzz-build-logs.storage.googleapis.com/badges/syzkaller.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?q=label:Proj-syzkaller)
 [![Go Report Card](https://goreportcard.com/badge/github.com/google/syzkaller)](https://goreportcard.com/report/github.com/google/syzkaller)
 [![Coverage Status](https://codecov.io/gh/google/syzkaller/graph/badge.svg)](https://codecov.io/gh/google/syzkaller)