niv minimization: remove [remove_lower] abbreviation
niv minimization: remove [remove_lower] abbreviation

It's not long, used only once and it's easier to understand what it
does when it's inlined.

Zimmi48/coq,coq/coq,SkySkimmer/coq,gares/coq,maximedenes/coq,Zimmi48/coq,JasonGross/coq,maximedenes/coq,ejgallego/coq,coq/coq,gares/coq,SkySkimmer/coq,silene/coq,gares/coq,ejgallego/coq,Zimmi48/coq,Matafou/coq,maximedenes/coq,ppedrot/coq,ejgallego/coq,silene/coq,ppedrot/coq,ejgallego/coq,maximedenes/coq,Matafou/coq,SkySkimmer/coq,gares/coq,maximedenes/coq,ppedrot/coq,ppedrot/coq,ppedrot/coq,JasonGross/coq,coq/coq,gares/coq,JasonGross/coq,coq/coq,Matafou/coq,Zimmi48/coq,silene/coq,JasonGross/coq,SkySkimmer/coq