fix mysql strings

Author: jogibear9988

src/Migrator/Providers/Impl/Mysql/MysqlDialect.cs

@@ -48,13 +48,8 @@ public MysqlDialect()
         RegisterColumnType(DbType.StringFixedLength, 16383, "TEXT");
         RegisterColumnType(DbType.StringFixedLength, 5592415, "MEDIUMTEXT");
         RegisterColumnType(DbType.String, "VARCHAR(255)");
-
         RegisterColumnType(DbType.String, 16383, "VARCHAR($l)");
-        //RegisterColumnType(DbType.String, 256, "VARCHAR(255)");
-        //RegisterColumnType(DbType.String, 256, "VARCHAR(255)");
-        //RegisterColumnType(DbType.String, 65535, "TEXT");
         RegisterColumnType(DbType.String, 5592415, "MEDIUMTEXT");
-        //RegisterColumnType(DbType.String, 1073741823, "LONGTEXT");
         RegisterColumnType(DbType.String, int.MaxValue, "LONGTEXT");
         RegisterColumnType(DbType.Time, "TIME");