util: remove retry logic in shortid_generator

Use shortid.MustGenerate() instead of shortid.Generate(). Instead
of returning errors it will panic.

pkg/util/shortid_generator.go

@@ -7,18 +7,9 @@ import (
 func init() {
 	gen, _ := shortid.New(1, shortid.DefaultABC, 1)
 	shortid.SetDefault(gen)
-
 }
 
 // GenerateShortUid generates a short unique identifier.
-func GenerateShortUid() (uid string, err error) {
-	if uid, err = shortid.Generate(); err != nil {
-		if uid, err = shortid.Generate(); err != nil {
-			if uid, err = shortid.Generate(); err != nil {
-				return "", err
-			}
-		}
-	}
-
-	return uid, nil
+func GenerateShortUid() string {
+	return shortid.MustGenerate()
 }