Remove devcontainer support section

Author: kylecarbs

README.md

@@ -101,12 +101,3 @@ CACHE_REPO=ghcr.io/coder/repo-cache
 ```
 
 Each layer is stored in the registry as a separate image. The image tag is the hash of the layer's contents. The image digest is the hash of the image tag. The image digest is used to pull the layer from the registry.
-
-## devcontainer.json Support
-
-We don't support mounts, features, and many other primitives of `devcontainer.json`. We support the following:
-
-- `image`
-- `build`
-- `runArgs`
-- `workspaceFolder`