Remove uneeded step/check in flipHorizontalElement
Remove uneeded step/check in flipHorizontalElement

Ref: https://github.com/mathjax/MathJax-third-party-extensions/pull/20#discussion_r57006614

Edraak/arabic-mathjax-dev,Edraak/arabic-mathjax-dev,Edraak/arabic-mathjax,Edraak/mathjax-dev,Edraak/arabic-mathjax,Edraak/mathjax-dev