docs: remove note about buildkit not supporting git subdirectories
This has now been implemented in buildkit#2116, so this note can
be removed (once integrated into Docker).
@@ -110,12 +110,6 @@ Build Syntax Suffix | Commit Used | Build Context Used
`myrepo.git#mytag:myfolder` | `refs/tags/mytag` | `/myfolder`
`myrepo.git#mybranch:myfolder` | `refs/heads/mybranch` | `/myfolder`
-> **Note**
->
-> You cannot specify the build-context directory (`myfolder` in the examples above)
-> when using BuildKit as builder (`DOCKER_BUILDKIT=1`). Support for this feature
-> is tracked in [buildkit#1684](https://github.com/moby/buildkit/issues/1684).
-
### Tarball contexts
If you pass an URL to a remote tarball, the URL itself is sent to the daemon:
