Revert "simplify: Environ.push_named"
Revert "simplify: Environ.push_named"

This reverts commit 9394aefa8e519a9e2b1b45659a47d5ff3f15ed16.

Zimmi48/coq,SkySkimmer/coq,letouzey/coq-wip,JasonGross/coq,letouzey/coq-wip,ejgallego/coq,coq/coq,gares/coq,JasonGross/coq,maximedenes/coq,JasonGross/coq,ppedrot/coq,Lionel-Rieg/coq,letouzey/coq-wip,letouzey/coq-wip,william-lawvere/coq,silene/coq,ppedrot/coq,gares/coq,amintimany/coq,maximedenes/coq,Matafou/coq,william-lawvere/coq,amintimany/coq,amintimany/coq,ejgallego/coq,ejgallego/coq,Matafou/coq,gares/coq,ppedrot/coq,maximedenes/coq,SkySkimmer/coq,maximedenes/coq,william-lawvere/coq,coq/coq,ppedrot/coq,Lionel-Rieg/coq,JasonGross/coq,ejgallego/coq,gares/coq,gares/coq,Zimmi48/coq,Lionel-Rieg/coq,SkySkimmer/coq,maximedenes/coq,coq/coq,letouzey/coq-wip,Matafou/coq,silene/coq,ppedrot/coq,Zimmi48/coq,Zimmi48/coq,silene/coq,coq/coq,SkySkimmer/coq