Revert "style: add missing type marker"

This reverts commit e064f18730.

As discussed, this is explicitly using a type shorthand which is all
good.

cli/cli.go

@@ -8,7 +8,7 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
-func RunApp(version string, commit string) {
+func RunApp(version, commit string) {
 	app := &cli.App{
 		Name:    "abra",
 		Usage:   "The Co-op Cloud utility belt 🎩🐇",