Bhushan Shah authored Aug 31, 2020 and Bhushan Shah committed Sep 03, 2020

Previously qtvirtualkeyboard was integrated weirdly so that it was
acting as the focus object and proxy for input methods, however now that
we support proper input methods, this code is totally unused and it is
confusing to have it here, so just drop it

See: f26f2fe1 for the reference of the
code deleted.