Revert "Resolves: tdf#152411 clear before freeze to let gtk a11y ...

... drop reference"

It's no longer needed, since the original problem is solved
differently with Change-Id Id0c241d68ec4fbf933312008f7d0ee86bd3eab0c
("tdf#140659 gtk a11y: Don't unset model when freezing icon view")
in place.

This reverts commit 4e8331b77a2dcad2b10d3ca5b788711ea4e83a1b.

Change-Id: I5c94a1c610a807a09ab62577477135cc14dbcfa6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148558
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
diff --git a/starmath/source/ElementsDockingWindow.cxx b/starmath/source/ElementsDockingWindow.cxx
index 1ea324d..16a22d2 100644
--- a/starmath/source/ElementsDockingWindow.cxx
+++ b/starmath/source/ElementsDockingWindow.cxx
@@ -574,8 +574,8 @@ void SmElementsControl::setElementSetIndex(int nSetIndex)

void SmElementsControl::addElements(int nCategory)
{
    mpIconView->clear(); // tdf#152411 clear before freeze to let gtk a11y drop reference
    mpIconView->freeze();
    mpIconView->clear();
    mpIconView->set_item_width(0);
    maItemDatas.clear();