tests: remove vmwaretest.ConvertToStreamOptimizedVmdk()

in favor of OpenAsStreamOptimizedVmdk() which is also used by
the worker.

cmd/osbuild-image-tests/vmwaretest/vmware.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"os/exec"
 	"path/filepath"
 	"strings"
 
@@ -225,21 +224,3 @@ func WithSSHKeyPair(f func(privateKey, publicKey string) error) error {
 
 	return f(private, public)
 }
-
-func ConvertToStreamOptimizedVmdk(imagePath string) (string, error) {
-	optimizedVmdk, err := ioutil.TempFile("/var/tmp", "osbuild-composer-stream-optimized-*.vmdk")
-	if err != nil {
-		return "", err
-	}
-	optimizedVmdk.Close()
-
-	cmd := exec.Command(
-		"/usr/bin/qemu-img", "convert", "-O", "vmdk", "-o", "subformat=streamOptimized",
-		imagePath, optimizedVmdk.Name())
-	err = cmd.Run()
-	if err != nil {
-		return "", err
-	}
-
-	return optimizedVmdk.Name(), nil
-}