Delete unused internal/ignition package

This is a leftover from the `osbuild/images` split`.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

internal/ignition/ignition.go

@@ -1,31 +0,0 @@
-package ignition
-
-import (
-	"encoding/base64"
-	"errors"
-
-	"github.com/osbuild/osbuild-composer/internal/blueprint"
-)
-
-type FirstBootOptions struct {
-	ProvisioningURL string
-}
-
-func FirstbootOptionsFromBP(bpIgnitionFirstboot blueprint.FirstBootIgnitionCustomization) *FirstBootOptions {
-	ignition := FirstBootOptions(bpIgnitionFirstboot)
-	return &ignition
-}
-
-type EmbeddedOptions struct {
-	Config string
-}
-
-func EmbeddedOptionsFromBP(bpIgnitionEmbedded blueprint.EmbeddedIgnitionCustomization) (*EmbeddedOptions, error) {
-	decodedConfig, err := base64.StdEncoding.DecodeString(bpIgnitionEmbedded.Config)
-	if err != nil {
-		return nil, errors.New("can't decode Ignition config")
-	}
-	return &EmbeddedOptions{
-		Config: string(decodedConfig),
-	}, nil
-}