evas_textblock: remove special treat for variation sequence text run
Summary:
Now there are no need for special care for variation sequence text run break.
General method will care about all types of characters\
this is also related to D11096
Reviewers: woohyun, bowonryu
Subscribers: cedric, reviewers, committers
Tags: efl
Differential Revision: https://phab.enlightenment.org/D11602