Remove -env-var-params support in :def command
Remove -env-var-params support in :def command

It is not used

rstacruz/kakoune,xificurC/kakoune,danielma/kakoune,jjthrash/kakoune,Asenar/kakoune,ekie/kakoune,elegios/kakoune,Asenar/kakoune,lenormf/kakoune,jkonecny12/kakoune,flavius/kakoune,flavius/kakoune,jkonecny12/kakoune,jkonecny12/kakoune,ekie/kakoune,Somasis/kakoune,ekie/kakoune,lenormf/kakoune,danr/kakoune,Asenar/kakoune,occivink/kakoune,elegios/kakoune,Somasis/kakoune,zakgreant/kakoune,elegios/kakoune,mawww/kakoune,jjthrash/kakoune,jjthrash/kakoune,casimir/kakoune,rstacruz/kakoune,alpha123/kakoune,rstacruz/kakoune,jjthrash/kakoune,danielma/kakoune,lenormf/kakoune,zakgreant/kakoune,danr/kakoune,xificurC/kakoune,zakgreant/kakoune,mawww/kakoune,Somasis/kakoune,alexherbo2/kakoune,flavius/kakoune,occivink/kakoune,alexherbo2/kakoune,danr/kakoune,mawww/kakoune,mawww/kakoune,casimir/kakoune,danielma/kakoune,rstacruz/kakoune,alpha123/kakoune,alpha123/kakoune,zakgreant/kakoune,elegios/kakoune,Somasis/kakoune,occivink/kakoune,flavius/kakoune,ekie/kakoune,danielma/kakoune,jkonecny12/kakoune,casimir/kakoune,occivink/kakoune,alpha123/kakoune,xificurC/kakoune,lenormf/kakoune,danr/kakoune,xificurC/kakoune,alexherbo2/kakoune,casimir/kakoune,alexherbo2/kakoune,Asenar/kakoune