bootdeploy: remove dependency on misc.Exists

Checking for the app is unnecessary, since the cmd.Run later will fail
if it doesn't exist. This allows dropping the dependency on misc.Exists.

There's also no reason to print that the command failed, just return the
error.

internal/bootdeploy/bootdeploy.go

@@ -8,8 +8,6 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
-
-	"gitlab.com/postmarketOS/postmarketos-mkinitfs/internal/misc"
 )
 
 type BootDeploy struct {
@@ -87,14 +85,10 @@ func bootDeploy(workDir string, outDir string) error {
 		"-d", workDir,
 		"-o", outDir,
 		"initramfs-extra")
-	if !misc.Exists(cmd.Path) {
-		return errors.New("boot-deploy command not found")
-	}
 
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
 	if err := cmd.Run(); err != nil {
-		log.Print("'boot-deploy' command failed")
 		return err
 	}