These rules shall supersede all Court Rules heretofore promulgated for any court; and all of said prior Court Rules are hereby repealed; provided, however, any rules or procedure heretofore adopted by a particular county or district court or by any Court of Appeals which were not of general application but were solely to regulate procedure in the particular court promulgating such rules are to remain in force and effect insofar as they are not inconsistent with these rules.
Tex. R. Civ. P. 821