Removes _navigation.scss mixin file.
Removes _navigation.scss mixin file.

rcarmo/Ink,sapo/Ink,pedrocorreia/Ink,Anmo/Ink,sapo/Ink,pedrocorreia/Ink,rcarmo/Ink,mubassirhayat/Ink,pkdevbox/Ink,pkdevbox/Ink,sapo/Ink,mubassirhayat/Ink,pedrocorreia/Ink,pkdevbox/Ink,birthdayalex/Ink,rcarmo/Ink,birthdayalex/Ink,Anmo/Ink,birthdayalex/Ink,Anmo/Ink