Fix database connections never being pooled

Author: smoogipoo

osu.Server.QueueProcessor/DatabaseAccess.cs

@@ -25,8 +25,7 @@ public static MySqlConnection GetConnection()
                 string user = (Environment.GetEnvironmentVariable("DB_USER") ?? "root");
                 string password = (Environment.GetEnvironmentVariable("DB_PASS") ?? string.Empty);
                 string name = (Environment.GetEnvironmentVariable("DB_NAME") ?? "osu");
-                bool pooling = string.Equals(Environment.GetEnvironmentVariable("DB_POOLING"), Boolean.FalseString, StringComparison.InvariantCultureIgnoreCase)
-                               && Environment.GetEnvironmentVariable("DB_POOLING") != "0";
+                bool pooling = Environment.GetEnvironmentVariable("DB_POOLING") != "0";
                 int maxPoolSize = int.Parse(Environment.GetEnvironmentVariable("DB_MAX_POOL_SIZE") ?? "100");
 
                 string passwordString = string.IsNullOrEmpty(password) ? string.Empty : $"Password={password};";