Did the Catholic Church decree that the Pulpiti in Cathedrals should be removed?

In short, no.

Pulpits (It. pulpiti, Lat. pulpita) have been standard in Catholic
churches and cathedrals since the Middle Ages.  Pulpits evolved from
the earlier "ambo" which had been a preacher's platform since the time
of the Fathers of the Church.  The modern style of ornamental pulpits
is derived from that of thirteenth-century Italy.  It is certain that
at no time has the Church decreed that all pulpits in cathedrals be
removed, as Catholic cathedrals continue to house pulpits, many of
them originals from the Middle Ages and Renaissance.  Below is a link
on the history of the pulpit from the 1911 Catholic Encyclopedia.

Catholic Encyclopedia: pulpit
http://www.newadvent.org/cathen/12563b.htm