Remove bake support for now (future release or subaction)

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

test/Dockerfile-bake

@@ -1,4 +0,0 @@
-FROM alpine
-
-ARG name=world
-RUN echo "Hello ${name}!"

test/config.hcl

@@ -1,39 +0,0 @@
-group "default" {
-  targets = ["db", "app"]
-}
-
-group "release" {
-  targets = ["db", "app-plus"]
-}
-
-target "db" {
-  context = "./test"
-  tags = ["docker.io/tonistiigi/db"]
-}
-
-target "app" {
-  context = "./test"
-  dockerfile = "Dockerfile-bake"
-  args = {
-    name = "foo"
-  }
-  tags = [
-    "localhost:5000/name/app:latest",
-    "localhost:5000/name/app:1.0.0"
-  ]
-}
-
-target "cross" {
-  platforms = [
-    "linux/amd64",
-    "linux/arm64",
-    "linux/386"
-  ]
-}
-
-target "app-plus" {
-  inherits = ["app", "cross"]
-  args = {
-    IAMPLUS = "true"
-  }
-}