[docs] Remove testacular dependency in contributing.
[docs] Remove testacular dependency in contributing.

robdodson/karma,iammerrick/karma,thirtyseven/karma,maksimr/karma,lencioni/karma,xiaoking/karma,hppycoder/karma,rhlass/karma,jjoos/karma,cironunes/karma,ahaurw01/testacular,skycocker/karma,ck1125/karma,switchfly/karma,IveWong/karma,SamuelMarks/karma,OniOni/karma,wesleycho/karma,astorije/karma,youprofit/karma,sym3tri/testacular,thirtyseven/karma,tomkuk/karma,ijobling/karma,pedrotcaraujo/karma,ashaffer/karma,agrublev/karma,r3mi/karma,sja/karma,fivetanley/karma,sja/karma,gdi2290/karma,karma-runner/karma,alextucker/testacular,youprofit/karma,pedrotcaraujo/karma,panrafal/karma,tomkuk/karma,MiCHiLU/testacular,pedrosnk/karma,MiCHiLU/testacular,buley/karma,codedogfish/karma,revolunet/karma,panrafal/karma,skycocker/karma,ashtuchkin/testacular,youprofit/karma,nmalaguti/karma,iammerrick/karma,jsdir/karma,geddski/karma,machuga/karma,geddski/karma,timols/karma,WickyNilliams/karma,revolunet/karma,hppycoder/karma,stevemao/karma,andersjanmyr/karma,Grummle/karma,pmq20/karma,Demeterr/karma,patrickporto/karma,astorije/karma,cironunes/karma,yandex-lego/karma,stevemao/karma,adamnation/karma,simudream/karma,yandex-lego/karma,buley/karma,clbond/karma,markoa/karma,alextucker/testacular,Sanjo/karma,wilkerlucio/karma,marcodejongh/karma,behzad88/karma,nmalaguti/karma,muffs/karma,rhlass/karma,jan-molak/karma,johnjbarton/karma,hleeldc/karma,ernsheong/karma,panrafal/karma,mprobst/karma,david-garcia-nete/karma,timebackzhou/karma,rgaskill/karma,astorije/karma,unional/karma,Dignifiedquire/karma,pavelgj/testacular,jjoos/karma,amagee/karma,czchen/karma,wesleycho/karma,robdodson/karma,bertrandgressier/karma,swayf/karma,rhlass/karma,johnjbarton/karma,adamnation/karma,ajoslin/karma,codedogfish/karma,harme199497/karma,xiaoking/karma,brianmhunt/karma,buley/karma,brianmhunt/karma,jacopotarantino/karma,sylvain-hamel/karma,karma-runner/karma,remy/karma,jfroom/karma,mpj/testacular,KrekkieD/karma,rgaskill/karma,tomkuk/karma,vtsvang/karma,peteryates/karma,hindsightsoftware/karma,Grummle/karma,dmitriiabramov/karma,jjoos/karma,oyiptong/karma,dotfold/testacular,hitesh97/karma,xiaoking/karma,karma-runner/karma,timols/karma,simudream/karma,bitwiseman/karma,brianmhunt/karma,shakyShane/karma,marthinus-engelbrecht/karma,rhlass/karma,eddiemonge/karma,behzad88/karma,mprobst/karma,powerkid/karma,stevemao/karma,david-garcia-nete/karma,jsdir/karma,codedogfish/karma,marthinus-engelbrecht/karma,chrisirhc/karma,xiaoking/karma,pavelgj/testacular,jsdir/karma,IsaacChapman/karma,joakimkarlsson/karma,rylnd/karma,OniOni/karma,unional/karma,davidmichaelkarr/karma,jamestalmage/karma,aiboy/karma,Klaudit/karma,timebackzhou/karma,Klaudit/karma,dmitriiabramov/karma,IveWong/karma,chrisirhc/karma,rylnd/karma,kahwee/karma,jbdeboer/karma,vojtajina/karma,marthinus-engelbrecht/karma,maksimr/karma,kahwee/karma,hitesh97/karma,simudream/karma,makeusabrew/karma,switchfly/karma,machuga/karma,SamuelMarks/karma,pedrosnk/karma,bitwiseman/karma,gayancliyanage/karma,lencioni/karma,viruschidai/karma,Klaudit/karma,mccalltd/karma,clbond/karma,jmendiara/karma,xdissent/karma,tschaub/karma,clbond/karma,gdi2290/karma,rgaskill/karma,patrickporto/karma,muffs/karma,vtsvang/karma,lgalfaso/karma,Sanjo/karma,drkibitz/karma,Sanjo/karma,IsaacChapman/karma,skycocker/karma,yandex-lego/karma,codedogfish/karma,growlybear/karma,Sanjo/karma,ernsheong/karma,gfxmonk/karma,behzad88/karma,bertrandgressier/karma,sym3tri/testacular,vojtajina/karma,pedrosnk/karma,bitwiseman/karma,clbond/karma,dannycroft/karma,jamestalmage/karma,johan/karma,hexelon/karma,ijobling/karma,growlybear/karma,IveWong/karma,remy/karma,harme199497/karma,Basemm/karma,WickyNilliams/karma,ashtuchkin/testacular,sergeylukin/karma,pedrotcaraujo/karma,david-garcia-nete/karma,jeffjewiss/karma,rageshkrishna/karma,vtsvang/karma,peteryates/karma,Dignifiedquire/karma,kjbekkelund/karma,lencioni/karma,skycocker/karma,matti/karma,Dignifiedquire/karma,jacopotarantino/karma,marthinus-engelbrecht/karma,r3mi/karma,shirish87/karma,toranb/karma,oyiptong/karma,pmq20/karma,chrisirhc/karma,mpj/testacular,alextucker/testacular,johnjbarton/karma,davidmichaelkarr/karma,garcimouche/karma,jfroom/karma,KrekkieD/karma,fredrikbonander/karma,pmq20/karma,jankopriva/karma,kahwee/karma,thomasboyt/karma,amagee/karma,MiCHiLU/testacular,rageshkrishna/karma,joakimkarlsson/karma,stevemao/karma,ryanflorence/testacular,powerkid/karma,shirish87/karma,czchen/karma,Basemm/karma,Dignifiedquire/karma,jeffjewiss/karma,IsaacChapman/karma,jamestalmage/karma,pmq20/karma,aiboy/karma,makeusabrew/karma,agrublev/karma,harme199497/karma,jbdeboer/karma,marcodejongh/karma,fivetanley/karma,KrekkieD/karma,matti/karma,drkibitz/karma,patrickporto/karma,brenoc/karma,kahwee/karma,harme199497/karma,jan-molak/karma,aiboy/karma,pedrotcaraujo/karma,KidkArolis/karma,jankopriva/karma,oyiptong/karma,Klaudit/karma,hleeldc/karma,ajoslin/karma,simudream/karma,gfxmonk/karma,powerkid/karma,IsaacChapman/karma,NimaVaziri/karma,ijobling/karma,mccalltd/karma,vojtajina/karma,ashtuchkin/testacular,sublimino/karma,chrisirhc/karma,shakyShane/karma,nmalaguti/karma,jeffjewiss/karma,wilkerlucio/karma,hitesh97/karma,jamestalmage/karma,sublimino/karma,rageshkrishna/karma,mpj/testacular,igorlima/karma,IveWong/karma,karma-runner/karma,dannycroft/karma,sym3tri/testacular,thomasboyt/karma,mprobst/karma,dmitriiabramov/karma,xdissent/karma,ernsheong/karma,youprofit/karma,brianmhunt/karma,adamnation/karma,maksimr/karma,igorlima/karma,NimaVaziri/karma,eddiemonge/karma,tschaub/karma,timebackzhou/karma,buley/karma,unional/karma,zheller/karma,ck1125/karma,KidkArolis/karma,sergeylukin/karma,dotfold/testacular,johan/karma,gayancliyanage/karma,powerkid/karma,ryanflorence/testacular,vtsvang/karma,viruschidai/karma,zheller/karma,toranb/karma,brenoc/karma,unional/karma,johnjbarton/karma,hindsightsoftware/karma,patrickporto/karma,hitesh97/karma,taichi/testacular,shirish87/karma,aiboy/karma,ahaurw01/testacular,nmalaguti/karma,oyiptong/karma,gayancliyanage/karma,ashaffer/karma,gayancliyanage/karma,garcimouche/karma,sylvain-hamel/karma,SamuelMarks/karma,swayf/karma,tomkuk/karma,wesleycho/karma,jmendiara/karma,jjoos/karma,sylvain-hamel/karma,KrekkieD/karma,andersjanmyr/karma,growlybear/karma,lgalfaso/karma,ahaurw01/testacular,markoa/karma,astorije/karma,kjbekkelund/karma,timebackzhou/karma,Demeterr/karma,chhsiao1981/testacular,wesleycho/karma,hexelon/karma,fredrikbonander/karma,chhsiao1981/testacular