wina11y: Drop/Clean up CHILD event handling in subclasses

Now that Change-Id I62ab32342ef67c770ced9f0d2be867dc9355bd4a
("tdf#156561 wina11y: Handle CHILD event") has implemented
handling for the CHILD event in `AccEventListener`,
drop the overrides in child classes that effectively
do the same.

For the case that a new child gets added,
`AccFrameEventListener::HandleChildChangedEvent`
also passes the HWND, so leave that and only
forward to the base class for the other case.

Change-Id: I68d836abedbf3563df84187d56851820c043866f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155127
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

0 files changed, 0 insertions, 0 deletions