optimzie of postgres db code

database/postgres_init.go

@@ -13,15 +13,11 @@ import (
 var (
 	postgresOnce          sync.Once
 	_globalPostgresClient *gorm.DB
-	_globalPostgresMu     sync.RWMutex
 )
 
 // GetPostgresDBClient returns the global PostgresDB client.It's safe for concurrent use.
 func GetPostgresDBClient() *gorm.DB {
-	_globalPostgresMu.RLock()
-	client := _globalPostgresClient
-	_globalPostgresMu.RUnlock()
-	return client
+	return _globalPostgresClient
 }
 
 // InitPostgresDBInstance return instance of PostgresDB client