remove unused provisioners main pkgs

builtin/bins/provisioner-file/main.go

@@ -1,12 +0,0 @@
-package main
-
-import (
-	"github.com/hashicorp/terraform/builtin/provisioners/file"
-	"github.com/hashicorp/terraform/plugin"
-)
-
-func main() {
-	plugin.Serve(&plugin.ServeOpts{
-		ProvisionerFunc: file.Provisioner,
-	})
-}

builtin/bins/provisioner-local-exec/main.go

@@ -1,12 +0,0 @@
-package main
-
-import (
-	"github.com/hashicorp/terraform/builtin/provisioners/local-exec"
-	"github.com/hashicorp/terraform/plugin"
-)
-
-func main() {
-	plugin.Serve(&plugin.ServeOpts{
-		ProvisionerFunc: localexec.Provisioner,
-	})
-}

builtin/bins/provisioner-remote-exec/main.go

@@ -1,12 +0,0 @@
-package main
-
-import (
-	"github.com/hashicorp/terraform/builtin/provisioners/remote-exec"
-	"github.com/hashicorp/terraform/plugin"
-)
-
-func main() {
-	plugin.Serve(&plugin.ServeOpts{
-		ProvisionerFunc: remoteexec.Provisioner,
-	})
-}