It shall not be necessary for the High Court to proceed to any town for the purpose of holding any court in use to be held in such town, where there are no cases indicted for the sitting of the court at such town, or when so many of the persons indicted thereto have pleaded guilty before the sheriff at the first diet as to make the holding of a special court inexpedient, and in that event such cases as remain for trial may be ordered to be brought up at another sitting of the High Court in manner provided in section 117 of this Act.