The other day one of my colleagues asked “I have multiple selection - how do I remove the 3-th and the 5-th ranges?”. And I started explaining how ctrl+d and ctrl+k,ctrl+d works.
And we decided that this is a bit slow.
So I came up with this plugin: github.com/tuzemec/sublime-remove-regions
And since my python skills sucks a little bit - I’ll appreciate if somebody can look at the code 
I’ll add it to the the package control later.