README: remove obsolete build badge

We no longer test specifically whether Git's source code builds under
`core.autoCRLF=true`, as this is already tested implicitly by our
Windows CI/PR builds.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

README.md

@@ -2,7 +2,6 @@ Git for Windows
 ===============
 
 [![Build Status (Windows/macOS/Linux)](https://dev.azure.com/git-for-windows/git/_apis/build/status/git-for-windows.git)](https://dev.azure.com/git-for-windows/git/_build/latest?definitionId=17)
-[![Build Status (core.autocrlf=true)](https://dev.azure.com/Git-for-Windows/git/_apis/build/status/TestWithAutoCRLF)](https://dev.azure.com/Git-for-Windows/git/_build/latest?definitionId=3)
 [![Join the chat at https://gitter.im/git-for-windows/git](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/git-for-windows/git?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 This is [Git for Windows](http://git-for-windows.github.io/), the Windows port