Remove test for removed extension
Remove test for removed extension

This existed when the test was written, but was removed in https://github.com/github/linguist/pull/1734 and the test got lost in a merge somewhere.

yyx990803/linguist,whitj00/linguist,tschf/linguist,assimovt/ling-ist,seanders/linguist,christop/linguist,sebgod/linguist,Mx7f/linguist,kr/linguist,erkyrath/linguist,R4PaSs/linguist,hcatlin/linguist,osorgin/linguist,ammaraskar/linguist,FStarLang/linguist,kyoungrok0517/linguist,BerkeleyTrue/linguist,wcandillon/linguist,jrnold/linguist,mattn/linguist,yscho/linguist,yyx990803/linguist,github/linguist,seanders/linguist,douglas-larocca/linguist,iblech/linguist,nburkley/linguist,sebgod/linguist,pcantrell/linguist,stanhu/linguist,CegepVictoriaville/linguist,JJ/linguist,pchaigno/linguist,sagar290/linguist,stanhu/linguist,jtbandes/linguist,douglas-larocca/linguist,chiranjeevjain/linguist,jrnold/linguist,davidzchen/linguist,ilyes14/linguist,Rockyspade/linguist,JJ/linguist,chiranjeevjain/linguist,whitj00/linguist,jjatria/linguist,R4PaSs/linguist,manveru/linguist,mwpastore/linguist,jtbandes/linguist,yscho/linguist,matt40k/linguist,scttnlsn/linguist,FStarLang/linguist,sideci-sample/sideci-sample-linguist,scttnlsn/linguist,bluebear94/linguist,tschf/linguist,cokeboL/linguist,cokeboL/linguist,alvarotrigo/linguist,MadcapJake/linguist,mattn/linguist,PsichiX/linguist,manveru/linguist,erkyrath/linguist,iblech/linguist,mcandre/linguist,phpsgi/linguist,davidzchen/linguist,yyx990803/linguist,jjatria/linguist,pchaigno/linguist,alitalia/linguist,cybernet14/linguist,ppaulweber/github-linguist,kr/linguist,martynbm/linguist,c-lipka/linguist,kyoungrok0517/linguist,erkyrath/linguist,steventhanna/linguist,github/linguist,MahmoudFayed/linguist,anhongyue/test222,hcutler/linguist,cybernet14/linguist,c-lipka/linguist,meunierfrederic/octocatlinguist,thejameskyle/linguist,yyx990803/linguist,PsichiX/linguist,sideci-sample/sideci-sample-linguist,CoderXpert/linguist,pchaigno/linguist,georgesuperman/linguist,stanhu/linguist,alitalia/linguist,ya7lelkom/linguist,erkyrath/linguist,sebgod/linguist,adamkaplan/linguist,github/linguist,bluebear94/linguist,0a-/linguist,sebgod/linguist,assimovt/ling-ist,MadcapJake/linguist,wcandillon/linguist,JJ/linguist,georgesuperman/linguist,BerkeleyTrue/linguist,nburkley/linguist,a0viedo/linguist,thejameskyle/linguist,Rockyspade/linguist,christop/linguist,meunierfrederic/octocatlinguist,hcatlin/linguist,martynbm/linguist,matt40k/linguist,hcutler/linguist,ammaraskar/linguist,mcandre/linguist,ya7lelkom/linguist,CoderXpert/linguist,JJ/linguist,pchaigno/linguist,stanhu/linguist,steventhanna/linguist,MostAwesomeDude/linguist,a0viedo/linguist,marcojonker/test,mwpastore/linguist,MahmoudFayed/linguist,ppaulweber/github-linguist,marcojonker/test,meunierfrederic/octocatlinguist,phpsgi/linguist,pcantrell/linguist,adamkaplan/linguist,ilyes14/linguist,MostAwesomeDude/linguist,SRI-CSL/linguist,Mx7f/linguist,osorgin/linguist,CegepVictoriaville/linguist,alvarotrigo/linguist,sagar290/linguist,0a-/linguist,github/linguist,SRI-CSL/linguist,anhongyue/test222