No, this passage is to teach us that Yehoshafat included priests and
Levites into the court system - not that the court system had ceased
to exist.
HH: He established the whole court system after bringing the nation back
to the Lord:
2Chr. 19:4 And Jehoshaphat dwelt at Jerusalem: and he went out again
through the people from Beer-sheba to mount Ephraim, and brought them
back unto the LORD God of their fathers.
2Chr. 19:5 And he set judges in the land throughout all the fenced
cities of Judah, city by city,
2Chr. 19:6 And said to the judges, Take heed what ye do: for ye judge
not for man, but for the LORD, who is with you in the judgment.