[cleanup] Reduce error message chain for missing config file

Author: g3force

internal/app/controller/config.go

@@ -41,7 +41,6 @@ func LoadConfig(fileName string) (config Config, err error) {
 
 	f, err := os.OpenFile(fileName, os.O_RDONLY, 0600)
 	if err != nil {
-		err = errors.Errorf("Can not open config file %v. %v", fileName, err)
 		return
 	}
 

internal/app/controller/controller.go

@@ -81,7 +81,7 @@ func loadPublisher(config Config) Publisher {
 func loadConfig() Config {
 	config, err := LoadConfig(configFileName)
 	if err != nil {
-		log.Printf("Warning: Could not load config: %v", err)
+		log.Printf("Could not load config: %v", err)
 	}
 	return config
 }