Don't show appveyor status in readme
Don't show appveyor status in readme

Summary: Pull Request resolved: https://github.com/facebook/buck/pull/2385

Reviewed By: gnuthor, v-jizhang

Pulled By: v-jizhang

shipit-source-id: 04c04b986f9adc38a50ef2f62cb59e1f5ec32e46

Addepar/buck,facebook/buck,Addepar/buck,Addepar/buck,JoelMarcey/buck,JoelMarcey/buck,Addepar/buck,facebook/buck,kageiit/buck,JoelMarcey/buck,Addepar/buck,facebook/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,kageiit/buck,kageiit/buck,JoelMarcey/buck,facebook/buck,nguyentruongtho/buck,JoelMarcey/buck,Addepar/buck,facebook/buck,nguyentruongtho/buck,kageiit/buck,Addepar/buck,Addepar/buck,Addepar/buck,nguyentruongtho/buck,nguyentruongtho/buck,kageiit/buck,nguyentruongtho/buck,kageiit/buck,Addepar/buck,facebook/buck,JoelMarcey/buck,kageiit/buck,Addepar/buck,nguyentruongtho/buck,Addepar/buck,facebook/buck,nguyentruongtho/buck,JoelMarcey/buck,JoelMarcey/buck,Addepar/buck,JoelMarcey/buck