I am trying to do a bit of a tidy up and remove files I do not use. I have been following (without success!)
Basically his advice is to remove the icons and non required fonts from src/theme/variables.scss which I have followed (see below) both icons and noto-sans fonts commented out.
Ionic v4 does this automatically - one of the features I find most exciting. It only imports what you explicitly ask for. So you might want to try running your app under v4 and see if it works.
Thanks - but V4 is not yet ready for production (or at least that is my understanding) - I have been waiting and waiting for version 4 - must be over 4 months now!