Remove the word that shares the same pinyin prefix.
Remove the word that shares the same pinyin prefix.

This is necessary for case like "shi'jian" and 视. Though this can be
avoided from libime side, this is an easier and safer fix.

fcitx/fcitx5-chinese-addons,fcitx/fcitx5-chinese-addons,fcitx/fcitx5-chinese-addons